Looks like 12 "petals" on each polyp? Then it's alveopora. It's closely related to goniopora (flower pot coral). Is yours white? If so, that's not a good sign. They require pretty heavy spot feeding. Cyclopeeze and oyster eggs are good for them. The best way to feed them is to cut off the bottom of a soda bottle, put the soda bottle over the coral, then squirt the food through the top of the bottle, since they take so long to eat. If you don't shelter them when you feed them, their food will just get stolen by someone else before they get a chance to eat.