Humpback whales use unique songs to communicate throughout the world's oceans. But whaling and other threats almost silenced humpback whales completely. This book describes the characteristics of these animals and how bans on whale hunting and other efforts have helped save this distinctive species. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards.