I think that this is Hydnaphora, but not 100% sure. Was sold as a frag with no name. Will be trading it this weekend want to make sure I am trading what I say I am
A little more info... It will actually eat brine shrimp and mysis shrimp when blown on it, it puffs up very large, it has many mouths, and the polyps are retracted after lights out
It looks like it is, here is a very bad picture of an endive hydnophora. Top right in first pic, more to the top though. Second pic, the center. I doubt these pics help much though. This is what happens when you take pics with a 3.2 MP camera.