We had a very well cared for Oscar. He was a smart fish. He really only liked to eat tails. He was in a hundred gallon tank with just a few other fish besides his pet feeder halfgoldfish he refused to finish eating (every time he'd refuse to eat a goldfish, it got named after a meal or a food and became part of the fish family)

The bastard still tried to commit suicide like once a month. We were just lucky someone was usually home because I know what the cats wanted to do. I don't know what the damn fish wanted but he'd jump out of the tank regularly.