i got one in a reef.. He does eat ALOT.. If your put the dried brine, he will eat 4-5 pieces and be big and fat. Never touched the flatworms.. Never bothered any corals.. Softies atleast.. I myself would stay away from him, as he WILL KILL any shrimp in your tank.. He is buddies with a foxface and clowns.. I would try finding a really small one if i was you.. 2+ inches eat like monsters.