Rainbow Fish was the most beautiful fish in the ocean due to his colorful, glittering scales. However, he was lonely and proud, refusing to play with the other fish. When a little blue fish asked for one of his scales, Rainbow Fish refused. Later, a wise octopus advised Rainbow Fish to share his scales with the others to gain friendship. Rainbow Fish reluctantly gave a small scale to the little blue fish, finding he felt happy doing so. Rainbow Fish then shared scales with all the fish, becoming happier as he lost his beauty but gained friends.