Need some help ID this creature

[DogvalleyReef]

I bought a wild colony acropora from my LFS the other day. I thought I had dipped it and gone threw it carefully to not get any unwanted pest in my reef. Last night I saw this weird this under the rock the colony came on. Can someone please tell me what this is? If its bad or good? I tryied to pick it out using tweezers but with no success. Its rock hard, brown in color and seems to have a mouth or two.

 

[samnaz]

Hard to tell from pic but if it’s rock hard it maybe some type of coral like a cup coral. Any tentacles come out of the holes? Looks sorta like a tunicate but they are more softish like a sponge.

 

[DogvalleyReef]

Yes I know its a bad pic, I had to zoom alot with my iphone. But maby this picture is better? Here u can see the "mouth" better.

 

[kpullen716]

I am trying to ID something that looks like it may be something similar that is attached to the base of our Lobo! It almost looks like barnacles but it has multiple holes with small clesr tentacles protruding. If it moved I might think nudibranch from the shape but this one has me stumped!

 

[Alexopora]

Yes I know its a bad pic, I had to zoom alot with my iphone. But maby this picture is better? Here u can see the "mouth" better.

Looks to me like it is a tunicate. Does it have like two holes, one larger than the other?

 

[DogvalleyReef]

Yes

 

[Alexopora]

Yes

Then it is a tunicate. They are are harmless filter feeders. They shouldn’t cause any problems for your corals. Also it really depends on how much feeding you are giving. I notice that the tunicates in mine gradually disappear as time goes by as i barely feed my tank.