My cleaner fish ( he's like a cool camouflage-nurse shark thing! ) hides from everything and anything. Anything as in, someone approaches the tank, someone turns off a light, someone opens a drawer... someone tries to feed him. He will either camouflage with the castle, plants, or rocks or he'll just hide behind something.

Well, it's not as bad as when we first got him, but we've had him for so long and he's still such a little wuss!