I know I do not have a picture it is real hard to get one. I will try though. There is 2 spots on my Live rock that is charcoal black in color and it is velvety. Is this some type of leather coral?

Ok I have photos. The ones on the live rock was hard to get. The other is on a mushroom rock it is better. I think they are botht he same.

sounds like tunicates

sponge?

Can you get some pictures? The only black corals I know of are black sun corals and this barrel shaped one from the Caribbean(I forget the name, I'll look for it)...

::edit:: cannot find anything on the barrel shaped one, I swear I came across an article with pics a few years ago. Only other black ones I can find are a few from Hawaii or the Caribbean that resemble gorgonians.

Thanks. I cannot find anything Either.

Looks like black sponges to me, I have a few of them in my tank. I can only make out a few spots that look like they could be vents. If you can see small openings ( not lots of them ) then I would say you have a black sponge.

There is another shot of it in my tank thread, look sorta like this ?

Sponges. I have those too.

Check out chicken liver sponges

Dont see any openings. Looks simular except the ones in my tank are velvety in texture.

They are very sponge like and soft. When i look back at photos they were not there. several photos later they started showing up and slowly growing to where they are now.

Sponge.
I have a couple ot those velvety charcoal blacks.

What exactly do they neeed to grow? Trace elements? Because they are growing fast!

i know this is off topic but i have a black mushroom with pink specks on it