well, i was going to get some sort of dwarf angel, but i learned they can be agressive, especially toward fish that are the same coloring. I was going to get a flame angel, but i didn't want him to pick on my clown... And although they are considered "reef safe", some have still been known to pick on corals... It really all depends on the specific fish, though. You could try it, and keep an eye on him. If he's nice, keep him, if he's mean, take him back!