Thanks for all the advice, I have read up on corals I just dont' have an anatomy book on them, my book is called "Marine Invertabrates" and has lots of general info on most things but doesn't break down the corals as much as I would like them to. It does talk about their symbiosis with the zooanthellae, I have sufficient flow and sufficient light for my mushrooms and zoos to grow like crazy but not enough for SPS. To me a polyp is something that needs to be biopsied to determine if it is malignant or benign. Don't worry though, I have already talked to Gary and have everything under control, going to trade him for some Xenia. The rest of my aquarium doing awesome with the exception of coralline algae, it seems to be out of control and taking over everything.