white ? on branch rock.

[stormystormy11]

I got this branch rock with some zoa's and didn't pay much attention to the white on at first but it is growing and has very small polyps all over it which I assume means it is alive. Anyone know what it is? It does glow very white under the blue light. I like it but I'm afraid it won't let the zoa's spread and will over take the branch.

 

[Drvillen]

Best guess stormy squared, looks like a small leather coral to me... nice catch!!

 

[stormystormy11]

I have leathers in my tank and they grow up and out. This is growing on the branch mostly on the tips and one I noticed this morning has a hole like a sponge would.

 

[Bifferwine]

It looks like a sponge. If it's growing fast, you can peel it off and remove it.