FAQs about Live Rock Hitchhiker/Creature
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Some LR FAQs by James Fatherree, LR
Hitchhiker ID 1, LR Hitchhiker ID
2, LR Hitchhiker ID 3, LR Hitchhiker ID 4, LR Hitchhiker ID
5, LR ID
6, LR ID 7, LR ID 8, LR ID 9,
LR ID 10, LR
ID 11, LR ID 12, LR ID 13, LR ID
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LRID 18, LRID
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LRID 23, LRID
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& Non-Vert IDs 1, Tubeworm ID, Polychaete Identification, Live Rock 1, LR 2,
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Assistance please in identification
Hello from Australia and congrats on a great web site and an
inspiring source of information.
<Howdy and thank you>
I require some assistance please in identifying a stringy yellow/
cream coating at the very base of my live rock. I have attached a
<I see this>
It is only in this one small spot (hard to get to because of some
overhanging rock) and does not appear noxious or particularly
irritating to nearby corals. Nonetheless it would be good to
identify as friend or foe!
<Almost assuredly this is a sponge/Poriferan. Friend>
I have also attached a photo of my baby sea urchin. I found him
during tank cleaning about a month ago - at that time he/she was
about half the size than in this photo. Mum (and I now assume
Dad) are happy
eating Nori as well as commercial brands of red and brown sea
weed that I tie to rocks and sink. They are very peaceful
additions to the tank and have given me at least one offspring -
quite possibly more.
Are you able to provide any information on how/when they
<Are separate sexes... as all Echinoderms... have a pelagic
I assume they are egg layers with the male fertilizing the
I have not witnessed anything close to urchin "action"
in the tank!
<This individual was part of your "live rock" or
other hard material introduced into the system... Not sexually
Thanks for your help and keep up the good work.
<Welcome! Bob Fenner>
|Re: Assistance please in
Thanks for the reply. Can I please ask if you think it could be
possible my sea urchin is the product of my two adults?
<Highly unlikely... read here: http://wetwebmedia.com/urchinreprofaqs.htm
The reason I ask is I have not introduced any new live rock or
coral to my tank in over 6 months and this little guy has doubled
in size in the last 1 month so I am guessing is not >6 months
<Mmm, could be... growing much slower previously>
Also it is exactly the same species as my two adults and with all
the different types of urchins in pet stores over here it would
seem coincidental to have a hitch hiker of the same breed. I did
find a PhD student in Western Australia that was breeding them for
his studies - although I was unsure of the type - so I assumed they
bred readily in captivity?
<Can be induced to release gametes, IF brought into reproductive
fitness, ripeness... but the pelagic larval stage is very hard to
support in typical hobby settings. Requires specialized
recirculation, a dearth of mechanical disruption
Thankful for your reply and certainly not trying to argue the
<No worries. Am glad to discuss any/all point/s. Perhaps this is
an in situ reproductive event... BobF>
Unusual growth 11/22/10
I found your site about 2 months ago, and boy do I wish I had
heard about it 2 years ago when I first started into saltwater
<I as well>
I recently had the "worst nightmare" of a leaking tank
(72g) late on a Friday night, and managed to save everything to
put into a new tank and at the same time install a new Aqueon
Proflex2 sump in place of the Fluval 305 filter. After getting
everything back (no new additions) I found this strange white
creature growing under an overhang on the live rock. At first I
thought it might be some kind of Bryozoan but have my doubts.
Could you give it a shot at identification
<Though branched at the tips, due to colour and position, I
suspect this is a sponge/Poriferan. Not problematical>
Tank is a 55g mixed fish (2 Clowns, Mandarin Dragonet, Imperial
<... this fish is misplaced here... Needs a much larger
Lattice Butterfly, Tomini Tang, Coal Beauty, 4 Damsels and a Long
Nose Hawkfish ),
<All need more room>
Soft Coral ( 2 leather corals, 3 Soft Tree corals and 2 Bubble
Tip Anemones) Running 2 Protein skimmers ( CPR Backpack 2 in the
sump) and Sea Clone 150 HOB (Is there such a thing as
<The bigger world. Now. Bob Fenner>
Re: Unusual growth
Many thanks for your info, yes I agree the tank is too small at
the moment, however panic mode set in and the 55g was all I could
get hold of at 8:00pm on a Friday evening. Plan is to get a 120g
shortly, an even bigger tank would mean moving the system
downstairs (or moving house, whichever ends up cheaper).
I have a very good LFS here in Abbotsford, B.C. who is always
willing to trade if the fish get too big.
<Good; though "it's" almost always too late to
I will keep an eye on the sponge/Poriferan and see if it changes
at all and let you know.
<Thank you. BobF>
live rock hitchhiker - what is it?
Hello Wet Web,
<And Wendy has...>
can you identify this little monster I found in my live rock?
<Mmm, yes; looks to be a Caprellid Amphipod... a skeleton
<Welcome. Bob Fenner>
Live Rock Hitchhikers 5/4/10
Dear WWM kind folks,
Would you be able to identify the following hitchhikers for
<Mmm, yes... the green bits appear to be the Chlorophyte
Neomeris sp., the red encrusting bit is likely coralline
The tank's a Nano that's been up for 6 months. Lights
have recently been (very) upgraded, and these plant-like things
are sprouting. Should I remove them?
Also, the red raised patch to the right - is that a sponge?
<Mmm, could be... >
<As many welcomes. Bob Fenner>
| full size crops
Don't know 10/16/10
Hello again, don't what they are or if I should be
<Mmm, your pix are very blurry, but I do think these are
likely undesirable. Read here:
Question for the Crew, LR ID 10/14/10
I am new to the Hobby and I am so "addicted", it is a great
hobby and I am getting hours of daily entertainment as well as learning
so much. I have a new level of appreciation for our precious
<Ahh, great to read/realize>
I will try to describe my question without a picture (what I am
questioning is small and translucent and my camera can't capture
it. Anyway, I have a 14 gallon Nano Reef Tank and on the glass (bottom
corner under the return) are 3 small creatures all
attached by what appears to be very thin hair like
threads all coming together to a single strand that appears to
have an embryo like form. I know without a picture and with my basic
non technical description that I am "grasping at straws" in
hopes of getting an answer.
Please let me know what it could be and I will do more extensive
research at my end.
<Perhaps some kind/species of Hydrozoan... Please read through
and the linked ID files above. Bob Fenner>
Interesting, and underwater 9/26/10
I was referred to this email address by someone on Reddit. They
said you are "very knowledgeable about most things
sea-water". I was hoping you could help me identify what
this is. I am just curious, because I
had not seen one before and have not seen one since.
<Mmm Dictyosphaeria, likely D. cavernosa...
a colonial green/Chlorophyte>
I saw it off the coast of Mexico, about 8 feet down. It was about
4 or 5 inches in diameter, I think.
<Welcome. Bob Fenner>
|Re: Interesting, and underwater
Wow! Very cool. Thanks for the help and for being so quick.
Now I know where to go for underwater questions :) Hope you
<Not at all. BobF>