Lil puzzle for i.ders

[shamanofsexy]

http://s835.photobucket.com/albums/zz278/rick14_2010/whats%20this/">http://s835.photobucket.com/albums/zz278/rick14_2010/whats%20this/</a>

Any ideas. I cant find anything online about it.

Its growing on the underside of my live rock its about 2 inches in size an i have no idea what it is.

 

[jef4y]

Looks like a sponge to me... Harmless filter feeder if so.

 

[raisedonnintendo]

JeF4y;613541 wrote: Looks like a sponge to me... Harmless filter feeder if so.

Plus 2 on that my friend. But the pic is blurry to me. Feel it is it kinnda stiff? If it is it's probably a sponge and like the dark lives on waste if I'm not mistaken. If it feels slimy whole nother ish!