sea cuke? maybe??
 

Referenced from Wetwebmedia.comI think I have one of these guys in my live rock. Must have been a hitchhiker from someone... (Richer, Bev??) Does anyone have more info or better pictures of these guys. I couldn't find any great ones on the web.
I just happened to notice it when I was doing the nightly 1 hour stare. :mrgreen:

Its dark maroonish colored and the branches were filtering something (food?) out of the water. The arms were extended and every couple seconds one would retract then extend again. I think I scared it though and all the arms retracted up in to a lump in a crevice in the rock.

Got to love all the great stuff about this hobby. Here is a not so great picture I did manage to find though...

http://perso.wanadoo.fr/sulawesi.bio.../preview13.jpg

Seems like you've identified it. Nice score. How big is it?

About a half inch or so lump. Hard to tell, its in a crevice.
The arms extend about an inch.
Looks really cool when he "feeds" :biggrin: