What the HECK is this???

[timmytimtim]

It's growing on a piece of live rock. Started small and flat...now it's getting fatter and round? Just wondering if it is safe or if I should get it out of the tank before it hatches/gives birth/opens up to release an alien mutant?????

THANKS for looking
Tim
http://www.maast.org/forums/picture.php?albumid=145&pictureid=1465

[sampsonndelila]

Sponge? I think I have a few as well. They have never hurt anything. I live and let live most of the time.

[corruption]

Yep, a harmless hitchhiker sponge -- no worries :)

-Justin

[Europhyllia]

yeah but look at the orange glow it emits!

[Europhyllia]

kidding obviously...

[Big_Pun]

sponge, i have pink,yellow,and white ones all over, yellow ones i call them sponge bobs they are bright, but the dont harm anything they help

[CoryDude]

Yep, usually a good sign for your tank!

[swjim]

If it's not a sponge it might be a tunicate.

[kkiel02]

It looks like it is going to spawn aliens pretty soon. lol