This guide to the marine environment covers all forms of sealife. It describes colenterates, molluscs, crustacea, urochordates, fish, reptiles, seabirds, cetaceans and sea mammals. The book opens with a section on oceanography and marine biology which explains the complex and fascinating processes that created the oceans as we know them today. In the fish plates, some species are illustrated for the first time. The seabirds, cetaceans, sea reptiles and sea mammals are also comprehensively illustrated. The plate section is followed by a systematic section on each group. The book should prove useful to the seafarer, and provide information to anyone interested in the marine environment.