critter ID

FRED0 · 05/18/2011, 02:08 PM

Anyone know what this is? It seems to stay in one place but it will withdraw itself back into the rock. I don't know if there's more to it than what's in the pic. What is in the pic is all that I have ever seen of it. It traps food in its arms then bends them one at a time into its mouth. It seems to be a harmless filter feeder. I was just curious what it might be. It came on Caribbean deco live rock.

aerie2008 · 05/18/2011, 03:12 PM

Some kind of sea apple or relative? I´ve seen a sea apple in a friend´s tank feed exactly the way you described.

I would not know which species live in the Caribbean, though.

AJSTITAN14 · 05/18/2011, 03:30 PM

Look like hydroids to me.

GerritM · 05/18/2011, 03:30 PM

That is a sea cucumber like Colochirus sp. or similar.
For comparison, one of my big sea cucumber (size 7,5"):

aerie2008 · 05/18/2011, 03:31 PM

Neat pics, Gerrit :-)

GerritM · 05/18/2011, 03:49 PM

Thanks Annika. ;-)

FRED0 · 05/18/2011, 05:42 PM

Thanks for the help. Is it common for a sea cucumber to stay in one location like that? I only see it when it's feeding but it's always in the same spot.

05/18/2011, 02:08 PM	#1
FRED0 Registered Member Join Date: Apr 2011 Posts: 10	critter ID Anyone know what this is? It seems to stay in one place but it will withdraw itself back into the rock. I don't know if there's more to it than what's in the pic. What is in the pic is all that I have ever seen of it. It traps food in its arms then bends them one at a time into its mouth. It seems to be a harmless filter feeder. I was just curious what it might be. It came on Caribbean deco live rock.

05/18/2011, 03:12 PM	#2
aerie2008 Registered Member Join Date: Feb 2010 Location: Germany Posts: 141	Some kind of sea apple or relative? I´ve seen a sea apple in a friend´s tank feed exactly the way you described. I would not know which species live in the Caribbean, though. __________________ 14 g tank since Sept2009. Koralia Nano + AquaClear 50. Solaris Marine 18 W (10.000 K). Mushrooms, Palys, Xenia, and Actinia equina. Avatar by KURT ZIMMERMANN

05/18/2011, 03:31 PM	#5
aerie2008 Registered Member Join Date: Feb 2010 Location: Germany Posts: 141	Neat pics, Gerrit :-) __________________ 14 g tank since Sept2009. Koralia Nano + AquaClear 50. Solaris Marine 18 W (10.000 K). Mushrooms, Palys, Xenia, and Actinia equina. Avatar by KURT ZIMMERMANN

05/18/2011, 03:49 PM	#6
GerritM Registered Member Join Date: Jan 2011 Location: Germany Posts: 570	Thanks Annika. ;-) __________________ regards Gerrit ps: sorry for my english. I hope you understand, what i mean. ;-)

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05/18/2011, 03:30 PM	#3
AJSTITAN14 Registered Member Join Date: Apr 2009 Location: Detroit, MI Posts: 305	Look like hydroids to me.

05/18/2011, 05:42 PM	#7
FRED0 Registered Member Join Date: Apr 2011 Posts: 10	Thanks for the help. Is it common for a sea cucumber to stay in one location like that? I only see it when it's feeding but it's always in the same spot.