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FAQs on Identification of Stinging-Celled Animals 11
Related Articles: Cnidarians,
Water Flow, How Much is Enough,
Related FAQs: Cnidarian
IDs 1, Cnidarian IDs 2,
Cnidarian IDs 3,
Cnidarians ID 4, Cnidarians ID 5,
Cnidarians ID 6,
Cnidarian ID 7, Cnidarian ID 8,
Cnidarian ID 9,
Cnidarian ID 10,
Cnidarian ID 12, Cnidarian ID 13,
Cnidarian ID 14,
Cnidarian ID 15,
Cnidarian ID 16, Cnidarian ID 17,
Cnidarian ID 18,
Cnidarian ID 19, & Anemone ID 1,
Aiptasia ID 1, Stony Coral ID 1,
Mushroom Identification,
Soft Coral ID,
Alcyoniid ID, Xeniid ID,
Cnidarians 1, Cnidarians 2,
Cnidarian Behavior, Cnidarian
Compatibility, Cnidarian Selection,
Cnidarian Systems, Cnidarian Feeding,
Cnidarian Disease, Cnidarian
Reproduction,
Acclimating Symbiotic Reef Invertebrates to Captive Lighting, | 
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Cnidarian Identification 2-1-08 Hello. <Hello. Yunachin
here.> Can you please help me tell whether the attached photo is
an anemone or a coral? We've had this piece of live rock for 6
months or more and originally thought this was a coral. Yesterday,
however, I noticed that it aggressively moves to take food that
drifts nearby and very quickly takes the food into a hole in the
center of its body. I thought only anemones did that, so now it's
got me wondering, which one is this? I've checked your site for
Cnidarian identification help, but I am still unclear which this is.
<This is in fact a type of anemone, Aiptasia. It is a common site in
marine aquariums and if not removed can become a very troublesome
tenant, even multiplying. Peppermint Shrimp are a good choice as are
Red Legged Hermit Crabs if you are searching for something to devour
this pest. Here is a link to help you learn more about them and
methods to eradicate them if you choose:
http://www.wetwebmedia.com/marine/inverts/cnidaria/anthozoa/Aiptasia/aiptasia.htm
;> Thanks, <You’re welcome!> Stephanie
Re: Mystery Cnidarian: Aip. contr. 2-2-08 Hello
Yunachin, <Hello again!> Thanks for the response. I read (and
read, and read some more) on your site now that I know what kind of
anemone we're dealing with. I definitely want to get rid of it
immediately, but I'm concerned about my corals. We have a large
variety of big, beautiful corals that were also quite expensive. It
sounds like the peppermint shrimp and/or the hermit crab will eat
those indiscriminately, in addition to the Aiptasia. Is that the
case? <I have never experienced any problems with TRUE Peppermint
Shrimp eating corals. The problem is they are sometimes mislabeled
and are really Camelback shrimp, which will taste your corals. Worry
not though as they are easily distinguished, the Peppermint Shrimp
being a much lighter color than the Camelbacks. As I see, the only
danger of adding the shrimp is they might be at risk of getting
eaten by any current livestock you have already. As far as the Red
Legged Hermit, they too will leave your corals alone and go on
scavenging for algae and Cyanobacteria. They may become food if you
have puffers though. Other than that you are in the clear! Good Luck
with your new clean-up crew.---Yunachin> Stephanie
Well, that's good news then, thanks for your help! <You're
welcome! --Yunachin> |
And it's free! RMF
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ID Help Requested - Zoanthid? 2/1/08 Yesterday I saw
something on a rock of mushrooms I had recently purchased. I didn't
take a long look at them but I assumed it was Daisy Coral (aka Clove
Polyps)... <Think this is so> but this morning I went and had
a proper look and it's something I've yet to come across and can't
find on a web search. They are small, about the size of Yellow
Polyps. Each polyps seems to have two tentacles <? Looks like
more to me> which moves around collecting particles which float
past. They are white with light green tips, white mouth and the pad
at the end of the 2 tentacles are white as well. Could they be
some kind of Parazoanthus? Regards, Paul <Please see here re
Cnid. higher tax.: http://wetwebmedia.com/cnidaria.htm and the
linked files where you lead yourself. This looks like a stoloniferan
to me. Bob Fenner> | 
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Polyps? Data? 2/1/08 Crew, I have some growths on
the back of my nanoreef. I have not been able to identify them, and
sadly not been able to get a decent picture. currently living in the
tank are a damsel, some reef hermits, red and blue legged, and Astrea
snails. 1 zoanthid colony and 1 colony of "ballet dancers" individual
yellow polyps. It looks like a *Parazoanthus gracilis *though I am only
guessing based on the image. when my skimmer crapped out one me, I have
a remora on its way now, the ballet dancers kinda went down hill, there
had been something like 20 or so polyps now there are only 4. these
growths on the back of the tank do not look like Aiptasia, but do look
similar to the polyps of the Zoa, they are a translucent white in color.
I looked at the images on the site and can find nothing that matches
them, any idea what these could be? <... how might one guess given
the above description?> should I worry? <?... maybe> they are
growing on the glass and silicon, but not on the rocks. is there
anything, other than the obvious improving water conditions, which I am
working on by doing partial water changes twice a week now, of about 10%
each time, to improve the health of the dancer? thanks again,
Forrest <Possibly knowledge gained by reading... Please start here:
http://wetwebmedia.com/marine/inverts/index.htm Cnid. Systems,
Health... the Zoanthids... Bob Fenner>
Coral ID – 1/26/08 Hey how you doing? Hope all is going
great! <Mmm, okay> I recently collected a few corals from our
local shore, they see to be doing fine as I had drip acclimatized
them for around 2 hrs! <Good practice> The images are of my
quarantine tank with natural sea water, which was collected with the
corals. <Mmm, okay... need to be distanced a bit more here...
like a good 15 cm. twixt colonies/pieces... I encourage placing the
skeletons up off the bottom as well... with pieces of drilled PVC
pipe... to allow circulation, observation, the "dropping off" of
unwanted hitchhikers> After the image of the full tank, I have
send close ups of each type, please try and ID these, so husbandry
can be provide accordingly! <... am given to suggest you NOT
collect what you don't know the simpler husbandry/biology of...>
Thanks in advanced, happy reefing! <? FWIW, I concur with your
initial assessments the "not know/n" is some sort of Faviid... Bob
Fenner> | 
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Pest? Nope, Corallimorph: Pseudocorynactis sp. – 1/24/08 Hi Crew,
<Hi there.> Not the best pictures but here are two of what I think
are pests. <Thankfully, they’re not pests. They’re neat little
Corallimorphs in the genus Pseudocorynactis, commonly called Ball
Anemones, or Ball Corallimorphs. They’re mostly nocturnal, extending
their feeding tentacles at night to catch any zooplankton or pods that
might happen by.> I only see 3 in the tank but want to make sure what
they are. The third one is deep in a rock and I can only see the white
tips. <That’s typical with these. For more information, please see
the FAQ at the first link, along with the photos and FAQ’s at the
second: http://www.wetwebmedia.com/mushridf4.htm
http://www.wetwebmedia.com/mushrmidfaq2.htm .> Thanks <You're
welcome. Take care -Lynn> |
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Identification of Mushroom/Ricordea/Zoa's 01/13/2008
Hey Guys, <<Hello, Andrew here>> I love your site, its priceless
to beginners like me! You save me hours of dead ends with all the posts!
:) <<Thank you, nice to hear>> I recently decided to upgrade my
fish only tank with Fiji live rock and a few easy soft corals...some
small Zoanthids (about 7 baby polyps), a mushroom, and a Ricordea, all
of which are pretty tiny as I have a 20 gallon tank for the moment..
looking to upgrade to larger more stable system when funds allow, and it
will make most things such as selection so much easier. Anyway, I
need some ID's on what I bought so I can care for them better, and the
guy at the saltwater aquarium store got on my nerves and I forgot to ask
for more specific names. (They are the best within several hours drive,
although they do push sales with little regard to what happens to them
after :( ) So here is what they look like so far: Mushroom- a kind of
bright burnt orange color with a small stalk for a base (its a little
bigger than a dime) <<These will be Actinodiscus - or commonly known
as red mushrooms. Keep separate from the other corals, can be a little
feisty>> Zoanthids- also orange\red color with a whitish core (tini
tiny) <<One manu different Zoanthid SP - Treat as any standard
Zoanthid. Read more here. http://www.wetwebmedia.com/zoanthid.htm >>
Ricordea- blue\green and a little bigger than a quarter <<This will
be Ricordea florida - More info can be found here.
http://www.wetwebmedia.com/corallim.htm >> I have about a 1/4 inch of
sand base with about 1 1/2 inch crushed coral on top (didn't want to
lose my sand critters when I changed substrates). I am running a protein
skimmer and a Penguin 150 water filter with carbon and an Aqualight 60w
actinic\10,000k and about 6lbs live rock\ 14lbs or so dead live rock
(just started buying live rock). The water filter pushes enough water
around the tank but at low flow so I put the Ricordea where the water
makes the slime move a little but not the Ricordea and also the
Zoanthids. The mushroom I put to the other side where the water flow is
lowest but still circulating well and consistent....is that about right?
Everything I've read said mushrooms don't do best in much current and
Ricordea like a little current to remove slime but like I said, the
Penguin doesn't push very much. Don't know where I should put the
Zoanthids so I just put them in the same area but about 4 inches apart.
Don't know if powerheads are necessary or desired so I don't have them.
<<Ricordea don't need a vast amount of flow, the Zoa's need more flow
again, not high though and the mushrooms are best to be placed in slow
to medium flow>> Being so small, is there anything I need to do
differently? I figured I need to be more careful with the small ones
than I would larger ones. Calcium is very high (just did 40% water
change) but don't know if its harmful at high levels.<<Wont do hard at
500ppm, however the water change is good for bringing that own>> I
bought some frozen coral food (mix of zooplankton and other stuff). am I
doing everything right so far? Do I need to feed the mushroom usually?
Some things I read so I really shouldn't supplement them much, just
allow them light.... <<You sound like your on the right track with it
all. Just be diligent with water quality, more info on feeding and
habitat can be found in the above linked articles>> Thanks for your
willingness to help! Joshua <<Thank you for the questions, A Nixon>>
Coral (?) identification James, <Now Bob... James
couldn't get your file to open... but it does here for me> Sorry
about that. I resent to myself and it said about 78kb so it should
be ok. Thanks Coral ID 1/6/08> <Brian, can you resize the
photo to something like two or three hundred Kb and resend. I had
two beers waiting for the file to download and it still wasn't
finished.> Thanks, James (Salty Dog)>> Hello, I didn't see anything
quite like the attached picture in the archives, so I'm hoping you
could give me a hand by helping identify. I've had it since I
received the live rock about 1 year ago. It was about half the size
it is now, and has many evenly spaced, bright green centers with
brown hair-like 'appendages' all around it. It doesn't appear to
spread to other parts of the tank or grow rapidly or have any
threatening features, so I'm just curious what you think it may be.
If you think it is something I should be concerned about, please let
me know. On the other hand, if there's something I should do to help
take care of it I'm open to suggestions. Thanks. > <Looks like a
sponge rather than a Cnidarian... but need to have a "closer", more
highly resolved pic to make out a bit better. Please send this
along... of whatever size. Bob Fenner> | 
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Hitchhiker #2 I.D. and advice 1/6/2008
Dear Crew: <B in B> Here is my second question for the New Year.
Please forgive me for being so greedy. But, after reviewing of a dozen
pages of Cnidarians I.D. and Hydrozoan I.D., I am stumped. These tiny
fellows are approximately 4-5mm in length. They grow in clusters as
shown and are starting to spread across the underwater landscape. I fear
them to be some sort of unwelcome Hydroid. What do you think?
<Look more like Zoanthids to me... do they share a communal base?> I
chose to send this photograph because one of the animals in the lower
left hand corner of the picture is back-lit showing some of the internal
structure. If indeed a hydroid, I presume you recommend waging war.
Thanks again for all the help you give to all of us. Brad in Basalt
<Mmm, I'd somehow isolate the colony to prevent its spread, bumping up
against other sessile life. Please read here:
http://wetwebmedia.com/zoanthid.htm Particularly on
Compatibility/Control. Bob Fenner>
Re: Hitchhiker #2 I.D. and advice, Zoa? Thanks for the reply
Bob, <Welcome Brad> Good question and good advice! I cannot tell
you if they share a communal base yet because they are so small and
fuzzy that destructive testing would be required. <Mmm, yes. Do take
a cursory read through here: http://wetwebmedia.com/cnidaria.htm re
the major distinctive differences twixt Cnidarian higher taxa> I can
tell you that they seem to be able to "propagate" rather than "spread"
to other locations as 4 of these clusters have shown up in various
locations within the tank. Is it possible that the original colony was
fractured by invertebrates with the pieces subsequently swept away on
the current? <Yes> Thanks again, B in B (under piles of a major
snow today) <Brrrrr! No thanks. The weather is currently even bad in
S. California. BobF> | 
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