Leo Lionni (1991), Dragonfly Books, an imprint of Random House Children's Books, a div. of Random House, Inc.
Swimmy is different than all of the other fish around him – while they are red and all look alike, he is black. One day, a large tuna comes around and eats all of the other fish, leaving Swimmy all alone. Scared and sad, Swimmy swims deep into the ocean, farther than he’s ever gone before. He runs into many interesting and beautiful creatures, until he comes across a group of red fish just like his old school! However, these red fish are well aware of the dangers that lurk in the ocean and are hiding away, too afraid to swim out or explore. Swimmy takes the lead and shows them how to look stronger than the tuna so that they will never be attacked again.