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FAQs about Brittlestars 3
Related Articles: Brittlestars, Sea
Stars, An Introduction to the
Echinoderms: The Sea Stars, Sea Urchins, Sea Cucumbers and
More... By James W. Fatherree, M.Sc.
Related FAQs: Brittlestars 1, Brittlestars
2, Green Brittlestars,
Brittlestar ID, Brittlestar
Behavior, Brittlestar Compatibility,
Brittlestar Selection, Brittlestar
Systems, Brittlestar Feeding, Brittlestar
Reproduction, Brittlestar Disease, Seastar
Selection, Seastar Compatibility, Seastar
Systems, Seastar Feeding, Seastar
Reproduction, Seastar Disease,
A baby Ophiuroid pic by Mike Giangrasso, from his very healthy
refugium.
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Bubble tip brittle starfish... no data or
reading 6/12/08
I have a bubble tip brittle starfish that has a bit of a problem. About 2
days ago i noticed that he has a hole in the center of his disc about 4 cm in
diameter. i don't know if this something to worry about because i could see
direct through him.
<... is>
i noticed that there where brittles that were moving through the hole that
appeared. Is this a common thing for starfish to do? I did do a water change the
day before this happened.
<Read here: http://wetwebmedia.com/marind5_5.htm
toward the bottom... Bob Fenner> Stars... 8/12/07
I caught a couple of Millipede Starfish. I was so gentle! Imagine my
surprise when some of the legs started dropping off. What was that about and how
could that have been prevented? Also, how can you preserve them?
Vickie
<Please read here: http://www.wetwebmedia.com/marind5_5.htm
the last two trays. Bob Fenner>
Polydactylous Ophiuroids? - 02/22/07
Bob,
<Hi Brian, Mich with you today.>
Possible for brittle stars to have more than 5 arms?
<Yep! More or less are possible. Often related to injury or reproduction... or
an injury resulting in reproduction!>
What I have in my tank - did not purchase - just showed up - tons of live rock -
has 6 arms - but has the disc body with small spiny arms.
<They are often hitchhikers. Be aware that if it's a green brittle star, it is
a potential fish eater.>
Just curious.
<A valuable quality.>
Thanks,
Brian
<Welcome! -Mich>
Brittle Star question, gen. husbandry 2/13/07
Bob, Anthony, Crew.
<Tirion>
Hope you are well.
<Yes my friend, thank you>
I am interested in obtaining general husbandry information (care and
feeding) of Ophiocoma wendtii. I have search high and low (well, at least
to me) and 99.9% of the articles and information center exclusively on the
crystalline lenses that make up their 'vision' and state nothing about their
habits.
<This is so... much of the "state" of invertebrate zoology is in a very
"early" phase of simple descriptive biology... Not much money to be had
(presently I emphasize) in general husbandry issues...>
I would have to 'assume' that they are standard brittles in most aspects,
sans being predominantly nocturnal. I have opportunity to obtain a
few. However I will not at the risk of its well being or the general well
being of my habitats populace.
Could you assist?
Regards and best to you all
Tirion
<As usual, I do wish I/we could... I am almost entirely ignorant re the
practical care of the vast majority of species on the planet, even just the
small percentage of those of common interest to us as hobbyists... If
anything, I would make a pilgrimage to a/the large college library closest
to you, and "do" a computer search bibliography re the species, then
genus... up to the Order, Class... With terms like "care", "feeding"... in
the search scheme... And of course, keep good notes yourself, use them and
your lively ambition as an aquarist to compose, present as an article...
Perhaps on our site! Bob Fenner>
Re: Brittle Star question 2/14/07
Thanks Bob,
<Welcome>
I have done so much looking for information (including some coastal places
such as the Aquarium off NC). I am reasonably sure that I have about as
much info as I am likely to get on this one - especially if you and the crew
are in the same situation.
<Perhaps... I can imagine what the "Net" is soon to become... and can
see/envision an "end-point" to our and other species in space and time>
I had an epiphany regarding the Starfish last night. Since these are
captive and ready for sale to 'someone', and I am one of the more conscience
hobbyists, I should probably just get them and care for them. That way, I
will know that whatever happens, their level of care will at least be
dutiful. My only failure to date have been Lysmata wurdemanni; and even
you advised me to just say no LOL. I do have one now btw, for over 8 months
now, so there :) (kidding around, y'all) Odd that my one downfall has been
one of the easiest to the majority.
<I see>
A similar thought to the Atlantic dwarf octopus I wanted to try - someone
will likely purchase it and pop it into a seahorse tank
<Mmm, sans the Gasterosteiforms...>
with low salinity and poor conditions. Am setting up a small system with
appropriate top and lighting for ceph's. and this is a good candidate. I
have access to smaller live foods. There is a reasonable chance for a young
juvenile so I might be able to track the entire sub 2-year life span.
<Neat>
Since they are not hermaphroditic that I am aware, I will miss out on any
chance egg laying though...
<Mmm, unless you were to be fortunate to secure a gravid, fertilized
female...>
Take good care.
<Be chatting my friend, BobF>
Green Brittle Star Dying? 10/6/06
Hi,
<Hello>
I have a 45 gallon saltwater reef tank and have had a Green Brittle Star in
there for about a year now. He is rather large and today I noticed one of my
small anemones affixed itself to the brittle star's body (on the top).
<!>
Well, when I came home, all I saw was a little bit of the anemone's tentacles
protruding from the upper part of brittle star's body.... Obviously he
penetrated it's skin and had moved INSIDE the brittle star.
<Mmm, likely the two were/are caught in a predaceous act... to the detriment of
the Serpentstar>
Well, the brittle star has continued to develop more "holes" on its upper body
and is "hiding" by the filter versus behind the live rock (where it has remained
for the last X months).
Any advice.... Is the anemone eating the brittle star from the inside out... or
is it the other way around??
<A bit of both. Please read here:
http://www.wetwebmedia.com/brittlestardisfaqs.htm
and the linked files above. BobF>
Thanks,
Craig Donnelly
Brittle Star... hlth., reading 8/16/06
I have a green brittle star. One of it's arms came off and a week and
a half still is moving in the bottom of the tank. The star is still doing
fine, other than the missing arm. Can you tell me why this happened and will it grow
back?
<Can...>
Why is the arm still moving?
<Happens>
Thanks
Patricia Neal
<Likely something amiss with the environment, and/or nutrition. Please read
here:
http://www.wetwebmedia.com/brittlestardisfaqs.htm
Sick brittle star? - 2/28/2006
Hi Crew,
I have a short spined brittle star in my reef tank. The other day I noticed
when I fed my fish, he did not come out of hiding. He always comes out when
there is food. I spotted his legs dangling, so I gave the legs a piece of food
which he accepted. I lifted the rock to see what was going on & he has a brown
spot on his disk. This happened over night. He is still hiding today. He
moved to another place & is still not coming out for food. It looks like his
"skin" came off in this spot & it is a little powdery. Is this an infection?
Injury? Parasites?
<Something amiss...>
I am still trying to hand feed his legs if I can or should I let him alone? I
hope he recovers. He is my favorite critter in the tank. Thanks, Linda,
"heartsick".
<Please read here:
http://www.wetwebmedia.com/brittlestars.htm
the linked files above... re Health/Disease, Systems of ophiuroids. Bob Fenner>
Does Killer the Brittle Star Have a Chance? - 12/11/2005
Hello,
<Hi Heather (my sister's name, she just calls me Brother though).>
I tried posting on the forum only to have it tell me (no matter how
many times I logged in) that I was a guest and couldn't.
<Sorry that it gave you trouble. Do keep trying.>
Today while beach combing with my daughter I found a plain brown Brittle Star.
He was out of the water for sometime (about 40 feet from the shoreline), on his
back looking dead (so I thought till I saw a slight movement in one leg).
<My dog does that sometimes. It's hilarious when the front ones get going.>
To make a long story short, Killer is now in a small tank with sea water and
some sand we picked up.
<Probably other "pollutants" in that sand. Could get ugly quick.>
He has perked up noticeably and is much stronger than when I found him and has
even gone after the bits of clam stuck in the shells we found and explored his
new 'tank'.
<Good signs. He may be a champ.>
A great improvement over a slight leg twitch on the beach.
<I don't know. I could go for a lazy, leg twitching day at the beach.>
Does Killer the brittle star have a chance after being completely out of the
water for so long?
<Hmm. Try playing the Rocky theme. Honestly though, these guys can be tough
sometimes. Think of the ones that are out of the water for over a week, maybe
two during the live rock collection/shipping process. Any water they are in is
putrid, but they make it to home aquariums all the time.>
Would it be better to release him back to the North Sea or take him to my
friend's aquarium store?
<He really could have been exposed to anything, so I wouldn't put him back at
this point.>
Ideally I would love to keep him, however I do not have a saltwater tank
(although I am willing to provide him with fresh water changes from beach I
realize that is daft and I don't know
diddle about saltwater aquariums to begin with.)
<Perhaps your friend at the aquarium store could teach you. If you do keep him,
I would look to synthetic salt for more environmental control (lots to die off
suspended in the ocean). It's a journey worth taking.>
Thank you for any advise you have,
Heather
<Hope I've been able to help. - Josh>
Brittle Starfish 12/1/05
Hi Bob,
<James with you today, Mr. Fenner is off on vacation>
Thanks for being the big help that you are!
<You're welcome>
I have searched the site for answers to certain questions. I have a brittle star (brown) forget the actual name. I also have a tomato clown, green
Chromis, Blue devil damsel (he is a devil),
<<We're waiting for the animal to be renamed "Chrysiptera
satanensis". MH>>
and a bi-color Angel.
I tested the water and everything looked good, except the Ph seemed a tad low. So I tried bump it up a tiny bit. The brittle star was to suffer from that move. He had what appeared to be sores at the top of two legs (near the body) Only for me to read on your site later he may have been ready to drop those. He also developed a hole in his body, it was small. I read he may regenerate these things with good water quality, so I did a quick water change and he appears to be recovering. I see no hole any more, That is good right?
<<Is very good, most folks have a good deal of trouble stopping necrosis
in starfishes once it starts. MH>>
To get to the real point.. The bi-color angel picks on him, I believe it is pulling the food off the Star. I read on you site they do not feel pain (star). So why does he flinch when the Angel picks at his legs. Is this normal behavior for the Angel?
<<More normal for larger Pomacanthids, definitely known with triggers, rather
than from Centropyge, but not unheard of. Marina>>
What can I feed the brittle star that the others won't steal from him. I read meaty items all over you site but what are those items exactly?
In the Angel's defense he also keeps the Devil in check, as does the clown.
<Joanne, by your description it appears the brittle star has developed necrosis, not an uncommon thing in sea stars. Starfish are very sensitive to changes in ph, temp, etc. which can lead to this condition. Acclimation should be done by the drip method. As far as meaty foods, and of the prepared frozen variety are fine although the brittle star will more than likely find plenty of uneaten food. James (Salty Dog)>
Thanking you in advance, Joanne
<You're welcome>
Starfish 11/30/05
Hi, I just purchased a live rock with lots of purple and green stuff and a purple mushroom, someone had moved and sold a pet store all their stuff out
of a 200 g tank that was about 7 years old, but the rock had (she said) a spiny starfish in it. It will not come out???? It's arms wave from every
crevice in that rock, they are 6 inches or so and black little ridges that wave like an anemone, what do I feed it, it catches the flakes and moves
them down into the center of the rock.
<Sounds like a brittle star by your description. No need to feed it, it will find uneaten food in the tank.>
I also have noticed some little gold/orange worms with lots of legs, like a centipede coming from the rock,
are they going to kill my tank?
<<Tanks don't die, fish do. Marina>>
<More than likely bristle worms, not a nice thing to have as they can multiply quickly. One way to keep the population down is by not overfeeding and creating excess nutrients. Most of these worms are harmless
detritivore feeders but some can grow large and eat other inverts in the tank. Coral banded shrimp and arrow crabs supposedly hunt down these critters for supper.>
They started moving to my other rocks.
<James (Salty Dog)>
Help please
<Also look at the FAQ's here. http://www.wetwebmedia.com/bristlewrmfaqs.htm
>
Green Brittle Star
11/10/05
I have a green brittle star and a black brittle star. We did a water change
a few days ago. Everything stayed pretty consistent as far as pH saltwater etc. However a few days after the change my Green star disk started
swelling it looks like he swallowed a rock and he's going to explode. Then a few days after my Green star did this my black star started as well. What
is going on?
<... mmm, maybe a reaction to the water change... but possibly from eating, reproductive products?>
Does it have anything to do with the water change (I was thinking it might but wouldn't they have started showing this right after
the change not days later)?
<Not necessarily>
Could it possibly be air bubbles?
<Doubtful>
I have a bubble tube under the gravel to emit little bubbles to float to the top is
it possible they swallowed air bubbles and can't get rid of the air? They are still moving and everything but the green one just yesterday had a arm
come off. Both the Green starfish and his severed arm are continuously moving. Let me know what I should do.
<... keep on keeping on...>
I also just read on your website that the green brittle star can eat sleeping fish (can the black one also?)
<Mostly Ophiarachna amongst commonly kept Brittlestars...>
Maybe that is what has been happening to my fish. I have a well established maroon clown who always hangs out in his anemone but when I try to add any
new fish like tangs they are fine during the day and then mysteriously over night they are dead with just their skeleton floating around or with crabs
and starfish eating the body in the morning.
<Oops... time to get a flashlight out, check during the night...>
I thought the starfish and crabs were eating them after they died. Is it possible that either the crab
or the starfish actually caught the fish and killed them?
<Oh yes>
Please get back to me as soon as you can. This is beginning to quickly become an expensive
project.
Sherri Berg
<Bob Fenner> Re: Green Brittle Star 11/10/05
Thank you for getting back to me so quickly. The Black star fish looks like
his stomach came out and he was eating something last night. This morning I checked on him and he looks fine his big hump is gone. However my green
one is not looking so good. He has lost another leg, still has his hump and is not coming out during feeding time.
Sherri Berg
<Please read here: http://www.wetwebmedia.com/brittlestars.htm
and the linked files above, particularly "Disease". Bob Fenner> Green Brittle Star 9/30/05
Hi, recently I bought a green brittle starfish last week on Tuesday. The pet
store had a display tank which they took down and put in separate tanks to be
sold. The brittle starfish I bought was from that display tank. <The most
common cause of problems with these animals is shipping stress. If this animal
was already established in captivity, then it has to be something else...>
My point is that now my starfish is like eating it's legs or something of the
sort. It's folding it's legs under him and I don't know if he's just cutting
them off or eating them (maybe both -.- ). Is he doing this because he's
stressed from all the moving around or what? <Most likely, yes. These animals
are very sensitive to changes in salinity and pH. It is most often recommended
to acclimate them to a new tank over several hours and many folks actually use a
"drip method" where a piece of airline with a loose knot is used to drip tank
water into the bag water at a rate of one drop per second or so.>
One more thing, my dad also moved the starfish from one side of the tank to the
other because we were afraid it was going after the damsels since he was in
their hiding place. Since we moved him, I feel he has been depressed or
something. They told us to feed him once a month. Is he just hungry? I hope
you can help,
I really don't want him to die. <Usually, when these animals start losing arms,
they are doomed. If it does recover, I would suggest small weekly feedings. I
would also watch it carefully for signs of predatory behavior, as they are quite
capable of capturing fish. Best Regards. AdamC.>
Green brittle star loses all legs 29 Jun 2005
Hi
my green brittle star just lost all of its legs over a period of 2 days.
<....>
I have him and his legs in their own one gallon tank now.
<?>
All system parameters are were they should be. do you have any idea what's
happening. in the tank i have one Koran Angel (left the starfish alone), one
Clarkii Clown (left the star alone), one Scooter Blenny (very peaceful), one
Lemonpeel Angel (didn't bother the starfish that i know of)
No rock collapses either
any idea
thanks
<Please read here:
http://www.wetwebmedia.com/brittlestardisfaqs.htm
and the linked files above. Bob Fenner>
Brittle Star Concern - 5/11/05
Dear Crew:
<Steve Allen taking echinoderm questions today.>
I have just purchased a black brittle star. Here are my questions:
1. I have dosed the water with Melafix (Aquarium Pharmaceuticals for my recent clown (False Percula) fish additions, Astrea Snails (2), and 1 Common Cleaner Shrimp (Lysmata amboinensis). I called the company and asked them if it was safe for the invertebrates. They said yes...were they wrong?
<I guess it is unclear to me why the Melafix was needed. Probably harmless and probably not all that effective either. I'm not aware of any evidence that it harms echinoderms.>
2. My Starfish has found itself a home among the cracks in the LR; however this morning it was all bunched up not extending
its arms looking for food (it looks curled up around itself). Is it dead or sleeping?
<This is what they do. They curl up and hide during the day. Check out the tank with a flashlight some night and you will see it out and about. You will also notice it withdraw immediately in response to the light. It is not uncommon to put one in your tank seldom see it again.>
4.
<What happened to #4?>
My PH will not stabilize. I have a crushed coral substrate, and have been adding Kent Marine
dKH/Buffer to help raise the PH. I'm under the assumption that PH fluctuates during the day am I correct?
<Just a few tenths. Some people operate a refugium lighted at night to help keep this more stable.>
I'm also adding at every water change Kent Trace Elements, Ammonia Detox, and Stability, and Prime. Any suggestions.
<Why the Ammonia Detox? Is it to get rid of chloramine from the tap water? That would be the only reason to
use it. Stability is not necessary either. It is meant to provide biofiltration. An established tank does not need it. You shouldn't need the trace elements either if you are using a good quality salt. You don't need all of these expensive supplements. I'd
suggest you verify your pH readings with your local fish store before worrying too much.>
24 Gal Nanocube (JBJ Lighting Systems)
15 Pounds of Live rock.
<Probably the biggest reason you are having stability problems is due to the small size of the tank. I'd suggest you do more reading on WWM and in books about nanos.>
Please advise me, I want to take back the brittle star back if I'm not ready for it. Is this Star as dangerous as the green one for my little clowns?
<They are not as nearly dangerous as the greens, but there are no guarantees. If it's not very big, and they grow normally, you should be OK.>
Thank You as always, Eric Ross
<My pleasure Eric. If you have further inquiries about the chemistry, please send a new e-mail titled as such so that it does not automatically get routed to me because it's "about echinoderms." There are others on the crew who may have other insights.> Link update on Brittlestars
Greetings,
I just browsed through some of the brittlestar FAQS and noticed that
the link to my website is a bit off (so it seems it does not work).
Granted I have not updated it in some time, but it is still out there
in cyberspace.
http://ophiuroid.home.att.net
or
http://home.att.net/~ophiuroid
Many thanks for your invaluable information!
Cheers,
Susan Hottenrott
<Thank you for this update. Bob Fenner>
Green basket starfish
I just purchased a green basket starfish and seems to be doing very well, but it has lost a few tips from it's "legs/arms". What causes this? My water is very good, and it is moving around. I would appreciate any info you have.
<The basket stars are strictly plankton eaters. They need to be fed daily to survive. They normally extend their arms at night to catch and trap the plankton, so you will have to feed at night. Some research on your part should have been done before purchase to see if the animal's requirements were acceptable to you. I'll post a link here I think you should read.
http://www.wetwebmedia.com/ca/cav1i4/echinoderms/echinoderms.htm Just scroll down to basket stars. James (Salty Dog)> Invertebrates n Stars
Good afternoon... some questions about invertebrates. Couldn't quickly find
the answers on your site.
90 gallon salt tank
3-5" live sand
90 lbs live rock
protein skimmer
I recently bought a sand sifting star to keep my sand sifted. After reading
your articles, I will be exchanging him for a brittle star as I do recognize
my tank set-up only provides about 5 sq ft of sand surface. I have
historically had one or two black brittle stars of which all had legs break
off and eventually die. I am guessing that this is likely due to water
quality as my tank was at my parent's house with me checking in about once
every two weeks. Anyhow, my tank has been relocated in a newly developed
basement. I am doing religious water changes
<Hee hee, while praying?>
and bi-monthly water quality
checks. I just noticed that my canister filter has not been filtering. I
suspect it ran for a few minutes but had an air bubble. In short, I may
have not had any filtration in my tank for not more than a week.
<Mmm, your live rock... et al. will have been "filtering". Do drain, rinse your
canister filter before firing over.>
I am doing
a 30% water change today, using water from my quarantine tank which matches
the 'healthy specifications' of my main tank. I did notice a little bit of
ammonia and Nitrate. My Sandsifting star still appears to be fine, but I
will be exchanging him for a brittle star in a few days. I also have a red
serpent star that had about 1/3 of one leg fall off. I'm guessing because
of the lack of filtration and water quality? Are my actions correct in
your opinion???
<Maybe and yes>
On another note, I seem to not be able to keep hermits crabs alive. I've
had two shrimp for over two years... never a problem. I have about 10
hermits that have been around for close to a year, and the rest (smaller
ones) seem to just disappear or die.
<Might be being eaten by the shrimp, something else, or...>
I am curious, is there an appropriate
salinity that I should be keeping my tank at to promote a healthier
condition for my crabs and seastars? I have typically been sitting at
around 1.0024 (might have an extra zero in there... but you know what I
mean, right?) salinity. As well, I keep my tank at 26oc. Are these
appropriate water conditions?
<Yes... near natural sea water: 1.025 or so... more important that this be
steady... as in using pre-made water, being careful to check, top-off for
evaporation...>
With my serpent star and new brittle star. Do these stars have to be fed
specifically? Or will they feed off leftovers?
<Depends on how much there is... Please read here:
http://www.wetwebmedia.com/brittlestarfdgfaqs.htm>
I typically change up and
use flake food that all my livestock are crazy over and then 5-6 hours later
use either frozen brine, krill, or worms. I typically plunge small frozen
cubes/bits or flakes a few inches into the water so that they are picked up
in the water flow so that they shoot all over the tank so that everyone gets
a fair chance to feed. Do I just rely on my brittles/serpents to feed off
the bottom from leftovers?
<Maybe>
Last question. I have a starving Algae Blenny, he seems to pick at the
live rock without algae. He is completely ignoring a nice pasture of green
hair algae and lots of rock with a burgundy encrusting algae.
<Not palatable to it apparently... the burgundy is likely BGA/Cyano... not
tasty>
I then
purchased some dried seaweed that I have been hanging on a feeder by his
little borrow. I also tried tying some seaweed onto a flat piece of
liverock with a thin fishing line. He still chews away at the non-algae
covered live rock and spits out the particles of sand, etc. I knew he was
herbivorous, but I figured that 2 yr system and algae covered live rock
(90lbs) would be sufficient. I spent two hours trying to catch the sucker
to move to my quarantine tank so that I can better target feed the guy...
couldn't catch him as my liverock is pretty porous and I didn't want to
totally disrupt my system. I am expecting his death any day now. Would a
3" Blenny that is almost all head n tail be much of an ammonia threat?
<No>
I have to leave town for several days and my girlfriend won't go near the
fishtank.
<Have another friend/aquarist, or a service company check in...>
One comment that hopefully would benefit other readers should you post this
on your website. Quarantining your fish, not only serves the purpose of
identifying health issues such as infections and disease... but also
provides a great opportunity to 'spot' feed and observe exclusive feeding
habits. As well, it's a helluva lot easier to remove a starving fish from a
quarantine tank than a large established system with lots of rock work. On
the other hand, all of my algae was in my main system... he would've starved
in my QT too! What a frustrating hobby at times. AYE YIY YI
<Thank you for this>
Thanks for your comments gentlemen.
Dave
<Bob Fenner>
Deep sea brittle star
Dear Bob,
Sorry, I forgot this photo of brittle stars. They're collected in
same place that I mentioned last e-mail.
Jay Pai
<Neat. The echinoderms rule many deep sea areas that are vast. Bob
Fenner> |
|
 |
Barred Brittlestars (10/21/04)
Bob, <Steve Allen, covering echinoderms tonight.>
I'm writing you because you seem to have the best website with information on
the brittle starfish. <Thanks. Fascinating creatures indeed.>
A couple of days ago I placed a new piece of live rock in my tank which being
purchased in Sydney Australia may have come from somewhere near the barrier reef
with lots of holes in it for just such creatures to hide. <Yes, a fairly small
rock on the reef may hold many of them.> So far I have seen 2-3 Brittle starfish
"like" creatures whitish with blackish barring on their legs and around and
their legs are up to an inch and a half long. <Either a small species or
juveniles of a larger one.> However they appear to have 6 legs not 5 <some do
have extras> and three of them appear to be far smaller ...possibly due to
re-growth <quite possible--legs eaten off or damaged in harvest>....however I
have seen this on at least 2 of them.....what are the chances of 2 being
attacked the same way at the same time? <Quite possible that they were damages
in the breaking of the rock.>
Can you help me identify them? <Not without pictures. They may not even have a
species name, as many do not.> I will endeavour to snapshot them if it helps
next time one is out in the light (they seem to stay in the crevices and holes
and are only seen moving from one to the other. <That is their nature. You may
want to have a look at volume 4 of Fosså & Nielsen's "The Modern Reef
Aquarium"--great info and lots of pictures.> And could they be harmful to the
fish at all? <Not likely. The big green brittlestar Ophiarachna incrassata is a
notorious piscivore, the smaller species are not.> I actually got up this
morning to find our Coral Beauty Angel dead on the coral sand.... <Other causes>
Thanks a lot, Rodger Wearne <Hope this helps.>
Holy Serpent star, part II
> Hey Jim and/or crew,
> Here is the picture of the thing poking out of my brittle star. I noticed an e-mail from another hobbyist describing what sounds like the same thing.
> Have you heard back from this person: "Wounded green brittle starfish 7/18/03"? I wonder if you could put us in touch to compare notes. My starfish is still alive and looks good but has not eaten any offered food since about a week ago. The "seeds" on his disk swell sometimes, I haven't determined what causes this effect. Please let me know what you
> think. Thanks.
> Lorraine
>>>Hello again Lorraine,
This may be a form of parasite, but if it is it's not something I'm familiar
with. Unfortunately I don't seem to be able to view pics that are sent here. I'm
not sure if it's a server issue or what. Anyway, if it were me, I'd try pull
the serpent star out, and check to see if these growths can be gently scraped
off.
Jim<<<
Tiny Brittlestars, Friend or Foe? (8/30/04)
I have recently noticed 4 or 5 very tiny starfish in my 120 gallon tank.
<Lucky you!> I have only seen there legs penetrating out of some of my live
rock. They seem to be white with dark bands! <cool> Any idea of what type of
starfish this could be? <No. Mini brittlestars for sure. Almost certainly not
babies of bigger brittle/serpent stars. There are so many of these in the sea
that there is little in the way of taxonomic classification that has been done
on them.> I haven't been able to get any pictures as they are fairly small.
<Yes> Recently when my flower pot coral retracted I saw 3 starfish legs sticking
out of a piece of the coral. Is this starfish eating my flower pot or has it
just found a home of a part that was already dead? <Found a home. BTW >95% of
all flowerpot corals are dead within months of being put in the tank. I'd
suggest you read about Goniopora on WWM. I had one once. I'll not try them again
until experts have found a way to keep them alive. Personally, I think they
should not be offered for sale to unwary aquarists (as I was when I bought
mine).> I also wanted to let you know that I have found another type of
starfish. It is definitely white. Not banded. At least the size of a
nickel. It has 4 short legs and 3 long ones. Yes 7 in total. <Probably Asterina
species. Not thin-legged like brittlestars. They reproduce by fission and often
are misshapen. Like brittlestars, they are beneficial scavengers, but can become
too numerous (many hundreds) under certain conditions.> I have a picture of this
one if you would like to see it. <Check the pictures of Asterina on WWM or in
books for comparison.> Thanks for all of your help. Lisa <Glad to be of service.
Hope this is helpful, Steve Allen.>
Injured Brittlestar? (2/27/04)
I had sent this message a couple of days ago:
Hey crew, <Steve Allen tonight>
Thanx for all the help so far. You guys take a lot of the
stress out of caring for a new tank. <Our pleasure.> This one is going to
be hard and unfortunately I don't have a digital camera. Either way I
can't see much of the new creature anyways. I looked through the
inverts section and didn't come across anything like this little
guy. Today I noticed to antennae sticking out of a
hole. At first thought they were just a tube worm but I noticed that
each one split into two at the ends. I also noticed that there were
to little "eyes" looking around. The shape of the eyes were
oval and very dark. I didn't get to see any of his body as he is to
timid to come out of the hole in the rock. I noticed
an empty hermit crab shell next to the hole....hopefully the crab wasn't
eaten....and it definitely isn't the hermit in the hole. I got home
tonight and noticed that the hole had been filled in. Being curious
and maybe not altogether smart I poked it the handle of a net. At
this time a piece of shell, clump of sand (not sure what) fell into the
hole. The little guy poked his head out and looked around and then
put the piece back in place. Unfortunately it can't describe him much better
than that as I haven't been able to seem out of his hole. IF you can
identify this or even point me in the right direction to try and identify him
that would be great. Thanks again, Todd Hawman
Today (Feb. 26/04) I fortunately figured out what it was...a bashing
Mantis Shrimp. <Why am I not surprised. They're wiley little buggers. I thank
my lucky stars to have never had the "pleasure" in my tanks.> I
heard him attacking 3 or 4 of my hermit crabs. He came with a piece
of live rock that I had for about a month and a half, lived inside in a little
hole then just came out on Tuesday (Feb. 24/04). In the process of
trying to catch him <did you succeed?> he swam to the rock where my
brittle star was hiding and I heard four or five clicks. I noticed
that the brittle star has 3 red spots on the center disc and 2 white spots on
one of the arms. Is this damage from the Mantis Shrimp or is the
Brittle Star sick?? <Probably injured, but at risk for infection. Keep your
water pristine and watch him closely.>
I was also wondering if I have to worry about eggs from the shrimp
since it had been in the tank that long and had gone unnoticed. <Probably not
unless it had a mate. Also, something is bound t eat any larvae long before they
grow into anything of concern.>
Finally I was curious about what color of green (bright green, dark
green, probably all sorts) are the Green brittle stars. <Kind of a drab
almost olive if it's Ophiarachna incrassata - pix on WWM at Brittlestar
page.> I am having a hard time identifying mine. He isn't very
green...more grayish, but he has stood up on all arms like a tent waiting for
fish to swim underneath <scary if you have small fish--read more on WWM>,
and most of the day he just sits under a rock and isn't very active.
<Typical. They mostly come out at night. If bold, they'll come out in low
light if food is placed near them.>
Tank parameters are: pH 7.9 (just recently dropped about .3) <Why? Very
important to look for & correct the problem. You really want 8.2-8.3 range.
Fluctuation is especially hard on echinoderms.>, ammonia 0ppm, nitrate 15ppm,
nitrite 0-0.25ppm (closer to 0) <definite zero always is best>, temp 26 degrees
C, SG
1.0215. <You should think about keeping it higher if you like inverts. More
like 1.023-1.024 and stable. Again, fluctuation is hard on echinoderms.>
Thank you for the help, love the site, Todd Hawman <Happy to
help.>
Broken Brittle Star (2/23/04)
Hi, I am setting up a new reef aquarium (72 gal w/ 25 gal
Refugium). I have some hermit crabs that have been in there for about
2 weeks. Yesterday I bought a cleanup crew from my LFS. The
package included a brittle star (Red and Black color). I notice
tonight when I got home from work that it is laying on the bottom sand directly
in the light and 2 of it's legs looked to have been cut off. All
other items (crabs, Mysis, snails) seem to be doing fine. The star
and the legs keep moving around every once in a while. What caused
this? <The toxins below> Is it dying? <Yes> Should I
remove it from the tank or leave it alone? <See below.> My water
parameters are: Temperature 77F, Salinity-1.022, PH-8.2,
Alkalinity-100/ppm, Ammonia-0.25, Nitrite-0.25 and Nitrate 40/ppm. Thanks
in advance for the help!
<Your tank is not fully cycled. You should have zero ammonia and zero
nitrite. Your nitrate would be better kept below 20. All of your nitrogen
compound numbers are toxic to echinoderms. Your SG is rather low for
echinoderms. Closer to 1.025 if preferred. Echinoderms also require very slow
acclimatization (preferably by drip) when added to your tank. Do not put any
more animal life in your tank until ammonia and nitrite are zero and nitrate is
lower. Your star is not likely to survive the shock of your toxic tank, but if
you can get some safe water in a quarantine tank and slowly acclimate the star
prior to transferring it there, you may save it. I would not leave the star in
your main tank. It will only slowly rot away and raise your toxins even higher.
Do read the brittle star FAQs on WWM for more knowledge of these fascinating
creatures. Hope this helps. Steve Allen.>
Gobies MIA -- Did the Brittle Star Get Them? (2/23/04)
I have green Brittlestar with arms about 12 inches across. I bought 2 yellow
Watchman Gobies, one small one and one pretty good size. The big one
I had for 2 days--now can't find them. Is it possible the brittle ate them?
<Indeed, rather likely. This species (Ophiarachna incrassata) can and will
eat gobies. The one you have is quite large--shouldn't have much trouble
sneaking up and ingesting a "pretty good sized" Yellow Watchman, the
maximum length of which is not more than 3 inches. On the other hand, they may
simply have burrowed somewhere out of sight. If they don't turn up soon, then
I'd write them off as expensive brittle star food. If you want any sort of small
or Gobioid fish, I'd give the star to someone who only has nice big fish rather
than what this brittle star takes for piscine Little Smokies. Perhaps your LFS
will take it.> thanks for help <You're welcome. Steve Allen>
Dying Brittle Star? (2/17/04)
Bob, <Steve Allen tonight.> I have a green serpent
star and have had him for about 4 months now. He has been doing well up
until this AM. I was feeding him small dead frozen fish from a local
saltwater dealer. <Are these fish that died of some unknown cause or
fish that are intended as food?> He would eat that no problem, then
about 2-3 weeks ago he stopped eating them. I assumed the fish were no
good (freezer burn?) and pitched them. I have been trying to feed him some
freeze dried food to no avail. <I generally feed mine a cheap fresh
seafood assortment from my local Albertson's.>
Today I noticed he has two holes on the top of his body.
<Uh Oh!> He still seems to be moving about normally but I can't get
him to eat. <Not good. These creatures are usually voracious
eaters.> I recently did do a move of the 55 gallon aquarium that he is
in along w/ four perculas, 1 Sailfin tang, and two green Chromis. At the
current moment my salinity is a little low and in the process of raising
it. <If you did not slowly acclimate the starfish to the salinity, temp
and pH of the new tank, he may be suffering from shock.> Temp at about
75. any suggestions or ideas on what this might be. <Some sort of toxic
effect. Once they start to disintegrate, they almost never survive. You
could try putting him in a QT (starting with tank water) and keeping the
water pristine. A broad-spectrum antibiotic might be helpful, but I am not
optimistic for the survival of a Brittlestar with a deteriorating central
disk, sorry to say.> |
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Brittlestar ID 92/7/04)
Hi - <Greetings.>
Well, I went to the LFS yesterday [you've heard this one
before ;-)] <Yup> Anyway - I sold myself on these
two sea stars ... which have been very slowly drip acclimated to my system
... and are presently being held in the refugium ... as I didn't want to
add them to either my soft coral tank or my SPS/clam tank without being
able to ID them and know their whole story.
I looked in the books I have, couldn't find a positive ID ...
so here I am. Look/labeled like serpent and a brittle star, which seem
from my reading [Calfo Fenner, sprung] to be reef-safe ... and good
cleanup guys. <Yes>
Can you ID them? Reef-safe I'm guessing? <#2 is and
Ophiolepsis superba. #1 is tougher. Definitely a brittlestar, possibly an
Ophiocoma of some sort. Volume 4 of "The Modern Coral Reef
Aquarium" has a great section on echinoderms. You may also find some
info on the web. All of these stars are of the class Ophiuroidea and most
available in the trade are of the families Ophiuridae, Ophiocomidae,
Ophiodermatidae or Ophiomyxidae.> Any worries for my clams? <No>
I can put them in either tank, or keep them in the refugium
[though not much a refuge then, is it?] <I'd leaven them out of
there.> Anyway - both seem healthy and doing ok ... and held in my
refugium before I move them to their permanent home, where I may never be
able to get them out. [might never see them again, too ... hiding in the
rocks] <Mine often come out during feedings or after the tank lights
are off but the room lights are still on.>
Thanks! Mark <Hope this helps. Steve Allen.><<RMF only has/had
one pic...>> |
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Mini Brittlestars (1/26/04)
Hello again, <Hi. Steve Allen tonight>
Let me start by saying that you guys are very good at your jobs. I have a
question about a serpent star that I have found
in my tank. I have been watching it for about 4 or 5 months now ,turns out there
is more then one. My question is are there a mini kind of the family?
<Yes> They seem to be a off white color and only about half an inch in
size. In the picture
there is a red dot in the centers just up from that is the one that I tried to
get a pic of , the dot is only about
half an inch for size reference. The smallest one I have seen in the tank in
only about a sixteenth of an inch in size.
<I can't view the picture because it's part of the message rather than a .jpg
attachment. By your description, these are
miniature brittle stars. Very cool to have. Some readers of this message are
surely envious. If you want more info, you can
read more in Bob & Anthony's "Reef Invertebrates" book.>
Serpent/brittle star in danger!!!!
Hi, crew thanks for the great web site. <You're welcome. A labor of love for
all.> I purchased a successful reef aquarium from a friend about a year ago
and have become hooked on the hobby, I have had FW tanks forever and always
assumed SW was too difficult. This tank has been up and running for
almost ten years!!! <impressive>
Now for my mistake(?) I have started experimenting
with different fish/inverts etc. My reef has approx 75 lbs of LR
covered in green mushroom anemones, sponges etc. I also have what
looks to be colt coral or some type of Xmas tree coral that seems to grow like a
weed. (haven't been able to identify it yet but cuttings have so far
financed my tank for a year!) <free enterprise is great>
LR sits on a 2-3 inch bed of sand/crushed coral. Original
inhabitants were a true <percula> clown, a few blue leg hermit crabs,
assorted snails, two short spine urchins(?), red lobster, two serpent/brittle
stars (not sure of the difference) and a small cuke. The
urchins and lobster have since died, not sure why, water is excellent
<tested?>. (age?) One of my stars had a falling rock incident
and was crushed. (Novice rock placement, oops) <If your rock is on
top of the sand rather than being based directly on the bottom of the tank,
collapse is always a risk.>
My question involves my remaining star. I found him
in the front of my tank one day with an arm severed, and wriggling. I'm
not sure what happened so I let it go. That was a couple of weeks
ago. Last night I noticed what appeared to be a white hole
in his main body, today the hole seems to have spread down an arm (necrosis?)
<Yes. Almost certainly fatal.> and there is exposed "skeleton". I
am concerned that one of my recent additions is not compatible with him despite
all my research.
I have added a yellow tang (6mos ago), blue damsel <a
definite meanie> (6mos ago), domino damsel <even meaner> (4mos ago),
pajama cardinal (4mos ago). Also added a few more hermits, lost a few
of them too (have seen carcasses) <tend to die easily.>, two turbo snails,
a coral banded shrimp, bristle serpent star, peppermint shrimp (thanks for that
idea, not a trace of Aiptasia now), a few feather dusters, small
amount of Caulerpa <yuck. messy in main tank.> and a orange Linckia star. (Linckia
has only been with us a day or two) <I'd be surprised if it lives tow weeks.
Very high mortality.>
Today I saw my peppermint on top of my star cleaning/eating
him? I hope he is just acting natural, I read one of your FAQs about
this that suggests that he is. I have observed the hermits on him a
time or two but they are very active so I'm assuming that they are just moving
over him. <Both the crabs and the shrimp are taking the
opportunity for a free meal from a helpless target.>
My water quality is excellent <what parameters do you
measure?>, wet/dry trickle filter, protein skimmer, mechanical filtration etc
all in tip top shape. Any ideas about what may be wrong/eating him?
<Initially wounded by something. Now in the process of being eaten by
bacteria & scavengers.> I don't have a QT but was wondering if
it would be ok to put him in the sump for recovery and if so how to care for him
there? (lights, food etc) Please help!!! Thanks. <You can try the
sump with a piece of LR for hiding, but the chance of it surviving with
spreading rot is virtually nil. A QT with antibiotic may help, but again most
unlikely to survive. Sorry.>
P.S. For Bob F. I have been using your book as a guideline
for my reef care, wonderful help thanks. <I'll pass this along as he's in the
next room.> I am in the process of planning my next aquarium and have decided
to go with a refugium/LR/sand bed set up despite the obvious success of the
wet/dry trickle in my tank. <You'll like the refugium method better,
especially for a reef--keeps the nitrates down.> I am intrigued by the
mangrove swamp refugium (for decoration as well as filtration) in addition to
utilizing a main under tank refugium. Where can I find
information/sources for set up, stocking etc.? <Some stuff on WWM. Also in
Bob & Anthony's Reef Invertebrates book. The latest FAMA magazine has a few
paragraphs in an overview article about various types of refugium.> I mail
ordered "creating a natural aquarium" by Peter Hiscock, but it is a
bit lacking in the mangrove section.
Yellow brittle star 1/13/04
Well, after another 10 days, the entire top of my star's body is
gone. All his insides are gone. That being said, he is still
active and the degeneration looks to have stopped and it never moved to his legs
at all. He really appears to want to eat, but as he has no innards
left he can't possibly. Have you ever heard of a star regenerating
that much of his body? Does it hurt him to just wait and see? Or
should I be humane and "destroy" him? Any suggestions on
the most humane way do that? Cold water/freezer is
what I have done with dying fish in the past. Thank you again for
your advice! Sherri
<Hello again Sherri. Sorry to hear of the severe progression of
this problem. It certainly does sound like it will be
fatal. Your biggest concern at this point is the rotting of the
remains of your starfish. If your tank is set up such that you can
easily find and remove any remains, I would leave it. If you think it
will be difficult to find and remove, I would remove it now. The
freezer is an OK idea, as is a plunge into the running garbage disposer (sounds
brutal, but is swift). Sorry for your loss. Adam>
Feeding Brittle Stars (1/4/2004)
I recently add 2 brownish colored Brittle Stars to my new 55 gallon reef
tank. What and how do I feed them. <Generally no need to feed these
critters in a reef tank. They are detritivores. They eat leftover food, fish
poop, etc. that the find on the substrate & rock. If you want to have some
fun, you can offer small bits of shrimp or other seafood on a prong. Hold it
near the Brittlestar or touch it a leg. It'll take it quickly.> I am
currently feeding the tanks only other inhabitants (10 hermit crabs and 2 small
Percula Clowns) a mixture of frozen foods. I have some phytoplankton,
bought in anticipation of adding corals. Will this plus the frozen
stuffs be enough? <Read more about feeding corals. Most non-refrigerated
phytoplankton products only increase nuisance algae without nourishing your
corals. Search WWM for info.>
Also, I have noticed small colonies on the front and back glass (before I added
te Brittle Stars) of very, very small white/clear "things". They have
a small circular body and 6-8 little appendages sticking out from all around. Could
these be Stars that came in with my live rock? Or are they Syconoid sponges?
<If they're stars, they'll move. Hard to say what you've got without seeing
it. Perhaps a hydroid? Check here: http://www.wetwebmedia.com/hydrozoanfaqs.htm
Thanks, Jerry W. - TX <Hope this helps, Steve Allen.>
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