Unidentified Coral (pic)

[sharper]

Was digging through some liverock rubble in my filter chamber to discover this guy.
Anyone have any ideas what it is? Thanks!
http://www.dropshots.com/photos/113104/20060811/150151.jpg

[duec22]

I would say it's probably some kind of sponge.

[Thurge]

Sponge.

[tacocat]

I think it's a Squarepants.