What is this?

[Aquarius]

Found on some live rock.

Few smaller pieces

It fluoresces.

 

[Highgrade]

Mushroom of some sort possibly?

 

[Mike N]

Sponge or tunicate, not quite sure. Nice color though

 

[Aquarius]

Yeah, it looks good... hopefully it doesn't peel off and eat my other coral [emoji849]. There are several rics on the same rock that were folded over until I put them in the tank. Couldn't believe they didn't take them off the rocks to sell them. Seriously 9 rics I've counted.