Im not an expert but I was thinking gonipora also. What do you mean they pushed it out? You had a rock in your tank with this on it and you didnt know it? Its amazing how that works, huh?
well the shrimp was working on it for several days and the stoped and 2 days later the snail ( turbo )finished pushing it out to the light. its absolutly amazing how that works i was using it to house my sun polyps. i am so glad it was pushed out!!!!!!!!!!!
go figure lol. i was told by jim at house od fish that it might be a favia or gornopia (sure i spelled it wrong ) just thought it was very different and never seen anything like it......
rick