WHAT the heck IS THIS??

I hade to move a peice of rock and found this bubble type of covering ....feels soft and rubbery ....clearish coraline in color ....its been 2 weeks ....hasnt increased or decreased in size ....ideas?

 

looks like some type of sponge growth

 

it is located where the 2 peices of rock connected ....its growing right overtop of a large coraline patch ....the pic is very poor quality. very interesting

 

+1 sponge should be safe and valuable member of your CUC, also a sign of good water quality.

 

and they help filter your water

 

I have a ton of the tiny scypha sponges. Its a clear rubbery film-like growth and it is the color of the coraline ....but opaque ....another filter is always good.

jakeh ....I clicked it ....I couldnt help myself ....hysterical!