what is this on my live rock?

[ponda]

http://i42.*******.com/20frllh.jpg

[JAnwyl]

Don't have an answer for you, and its not on this list but.....http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml

[bradleybradley]

Looks human to me :)

[CoralBeauty13]

Not aure, could be a sponge taking shape. You really should wear some gloves anytime you are in your tank touching things. Got a nasty sting from something two months ago that is just starting to fade. Be very careful.