What is this?

I have black clear bubbles in my live rock. I am assuming they are bubble algae? center of pic.

 

Have you consider sponge?

That is not bubble algae, but looks more like a type of sponge I used to get in my tank.

Remove one if you can and get an image.

 

So how is something black, and clear at the same time? This is interesting.

 

okay translucent.... @Tollhisdoom, thanks for your helpful answer. Thank you Coarilline I will look into it.

 

lol just messin with you! yea listen to coralline she knows whats up

 

Sponge