9Water covers approximately two-thirds of Earth's surface and is home to many types of interesting creatures. From the puffer fish, which can become a large, spiny ball in seconds, to the angler fish and its bioluminescent lure, marine animals can do some pretty wild things. Through engaging text and colorful photography, readers will learn all about the different adaptations that allow these sea animals to live in Earth's oceans. They're bound to have a whale of a good time!