Its not aiptasia - its a sps? coral. I have several colonies in my tank. They are very abundant on aquacultured rock from gulf waters. They are good filter feeders and will even enjoy some meaty stuff. They do not require heavy lighting but they don't seem to mind it either. They will sting others so watch what you put near them.
Thanks for the input mnreefman and reefrock! I *DID* find some LR with some aiptasia on it, but it was only a small part, and I just took it out of my holding tank and its airdrying on the deck for now. The little things in the pic are only about a dime sized, and seem to be ok. Freaky just seeing the life on my LiveRock is so much fun to do