In this amusing spin on the universal childhood game of “Follow the Leader,” one little fish, the leader, leads one, two, three, then ultimately nine other small fish through a winding course in the ocean. Along the way, they follow the leader as it splashes, hides, floats, and imitates other sea creatures. And when the leader instructs the other fish to eat a snack, they follow suit, eventually eating each other one by one. The last fish just happens to be a shark that gleefully swallows fish number nine, which, like the Russian nesting dolls, contains all of the other fish. However, all is not lost, for the shark emits a huge burp, expelling the nine little fish. Told in a singsong rhyme, the tale is part poetry, part marine biology, part addition and subtraction, and part happily ever after. The illustrations of the little fish and shark remind this reviewer of Muppets: bright colors, simple bodies, big mouths, and bulging eyes. The watery environment and its residents of rays, blowfish, turtles, crabs, and a whale have a softer feel— as if they were created with tissue paper and watercolor. Whatever the method, the book is a visual joy.