Some of the world's most beautiful, intelligent and highly adapted mammals inhabit our seas and oceans, and have stirred the human imagination for many centuries. As our knowledge of marine mammals grows, the need exists for a reliable and complete reference to the ecology and biology of these fascinating creatures. The Handbook of Marine Mammals series was founded with this in mind and now reaches its conclusion with this sixth and final volume. Within the pages of this classic series, scientists, conservationists and informed layperson alike can find the definitive review of all the world's whales, dolphins, porpoises, seals, sea lions, and related species as well as sea otters and sea cows. Numerous maps, photos and drawings illustrate the text. Concludes this major definitive series. A standard reference work on all of the world's marine mammals, their anatomy, distribution, ecology, and behavior. The most up-to-date research in a concise reference form. Numerous photos of live and specimen animals, skulls, and anatomical details, plus distribution maps.