Dive into Earth's oceans and discover the world of the blue whale! Stunning, full-color photos show these gigantic whales above water and below. A range map reveals where these special sea creatures can be found. A labeled diagram helps readers identify flukes, flippers, and more. The blue whale's habitat, senses, threats, diet, reproduction, unique behaviors, and enormous size are also introduced. These whales are already more than 20 feet long at birth. Find out just how big they grow to become the largest creatures ever to have lived on Earth! Plus, learn how deep blue whales can dive and the special way these baleen whales eat. A facts page, bolded glossary terms, and an index support the engaging, easy-to-read chapter text. Checkerboard Library is an imprint of ABDO Publishing Company.