|Swimming with this dolphin is not really therapeutic, it's sorta just disturbing.|
The main animals where the rule of "the fatter, the better" applies is with more cuddly animals. Pandas, penguins, and cats, there are good amount more I assume. Fish, on the other hand, can't handle being fat. It's just not cute. Puffer-fish are the only exception. So if you are faced with the decision to be an animal, be a penguin in a zoo. Nobody cares how fit you are, the lazier you are the better. When I grow up I'm gonna be a penguin.