White or translucent spongy growth on my rock

This appears to be multiplying on my rock

 

I have them also. They are some type of sponge. If we had Angel fish I believe they would eat it.
Adam

 

Sounds like a tunicate. They're very common.

 

i have them as well, but they only occur in my sump. maybe its because i have a couple angels in my dt.

 

i have a flame angel would he eat it

 

the ones in my tank that look exactly like that are called scypha sponges.

 

pineapple sponge is what it looks like to me