What is wrong with that stupid fish I bought for the aquarium? I put him in a big tank and he ignores the other fish but keeps running into the side of the aquarium like he's trying to break free.
OK, so the fish people tell me that I have the fish tank up against the wall and that turns the glass into a mirror. So the stupid fish is fighting his own reflection!
At least he should realize that his enemy is just as strong as he is and that he has all the female fish he can handle.