Description From huge sharks to pet goldfish, there are thousands of amazing fish all over the world. Each type of fish is very different, but now you can find out exactly what makes a fish a fish!. . Fish is part of Decodables by Jump!, a comprehensive library of decodable leveled readers that follow a sequenced approach to phonics instruction. Young readers will enjoy colorful, photo-packed nonfiction as they follow a prescribed format supported by the science of reading that encourages reading development.