I was really joking about him seeming to go nuts. If you've seen the movie, the angle fish is obviously crazy talking to her "twin" (her reflection) telling her to move out of the way so she can see. So Gil (the moorish idol) looks at nemo and tell him "fish weren't meant to be in a box kid" talking about the angel fish. Its what i thought of when you said he was attacking his reflection lol - i'm weird. I bet somebody got the reference though!