Annotation: "Did you know that 71 percent of Earth is covered in water? Down below, there are all sorts of unknown animals and hidden treasure. Discover totally extreme facts about what's happening below the waves in this fun and kooky book. With engaging hi-lo content to draw in 5th through 6th grade readers and a 2nd to 3rd grade reading level, reading is fun as well as accessible. It's a roaring good time!"-- cProvided by publisher.