Polyp ID?

Thanks JerryC! I hope I remember when the time comes! I haven't made any purchases in so long. I do feel like I need a trip to an LFS fix! :)

In my first post, those aren't connected ,they started off with just one polyp. the second post with the two pictures, I bought that as a colony and they are connected.

If they grow connected or solitary is just a way to help ID "polyps" I was checking out E.Bornemans book and he lists Epizoanthus as a non-zooxanthellate genus that are solitary and difficult to distinguish from some of the other "polyps".I'm gonna have to try and get a pic of the one in my tank.

Good research Dave, we'll have to see if we can get a better macro shot of the one we have, I took another look at him tonight and notices he does seem to open or close with the lights coming on or off.... your thoughts about not being symbiotic/zooxanthellate may have some merit for these guys...

Well Dave I really have to agree with you now, that one is definately different from the buttons we picked up today. A bunch of examples here to pick from, Angel found this rock today (we got a steal if you ask me), the rock itself is close to 15 lbs, about 14" x 9" and just covered with brown and pink button polyps. Got a halfway decent closeup of their structure as well... VERY different than the other guy.