Whales, dolphins, and porpoises have fascinated humankind for centuries. Amazingly diverse (more than 80 species), they have evolved specializations that allow them to exploit habitats ranging from surface waters to ocean depths. Whales and Dolphins of the World celebrates their variety, behavior, and natural history, illustrated by 180 color photographs, and surveys factors affecting them from hunting to pollution, with discussion of conservation actions needed in the twenty-first century.