What is this ?

[Sunshine]

I got this, it was in some sea shells from N. Carolina from a friend. I put it in the tank, not sure if it's a rock or what.

 

[AdeptMrSniffles]

A piece of dead coral. Probably a favia. Just a guess

 

[dcantucson]

+1 Adept. No question it's a skeleton.

 

[Sunshine]

Thanks.... it's a nice decoration now....

 

[dcantucson]

It will also be a good home for copepods and such.