Barry demonstrates all of the wonderful things he can do with his fingers, such as count, knit, type, paint, and play the piano. He even saves the others' lives when he points out a heavy object that is plummeting to the sea floor, and they can scatter before it lands on them. The box, it turns out, is filled with Pirate Jack's Tasty Fish Sticks, which enable the other fish to obtain fingers like Barry's. The book's pages are filled with bright, cartoonish, gouache illustrations.