I just got a maroon clown fish. He has been in my tank for about three hours now, but strangely, he prefers to swim directly next to the glass for some reason. The only other vertebrates inside the aquarium are two other damsels, a domino and a blue devil. There does not seem to be any physical aggression towards the clown from either fish, but when I introduce cyclopeeze to the tank he will not touch them. Usually when I feed cyclopeeze all my fish go nuts and swarm the cloud of red dots even newly introduced fish. What else could be wrong with my clown fish? All my water parameters are perfect.