I don't know if they're morays, but mine is doing well in my reef, I've had it since March and it hasn't bothered anything to my knowledge. Really hit or miss though, keeping them alive from what I hear.
Funny, mine doesn't seem the least bit interested in pieces of meat like most people say, but he goes nuts for small things like zooplankton and mysids, etc. But put a piece of krill or silverside in front of him and he runs away. Must be getting some nutrition though, since I've had him since March.