Masters of the Ocean Realm provides a colourful, accessible introduction to how scientists study cetaceans, such as whales and dolphins, and what they have learned. The book shows the interaction of whales, dolphins, porpoises, and human cultures around the world and discusses such conservation issues as tuna fishing, whaling, habitat degradation, pollution, and the threat of extinction. Numerous colour illustrations make the book appealing to a wide audience. Informative sidebars address topics such as whale intelligence, the mystery of mass strandings, and the tuna-dolphin controversy.