This photographic and descriptive guide to the fish species that inhabit the North Atlantic and Mediterranean emphasizes the appearance of marine fish in their natural habitats. It expands and recasts the Lythgoes' first edition published two decades ago. In particular, all of the more than 200 colour photographs are new, and most are accompanied by line drawings that emphasize distinctive traits. The fish are arranged by class, family, and species, and succinct descriptions give detailed information about anatomy, distribution, food and breeding habits. Most of the photographs were taken underwater, providing valuable information on how the fish swims in nature, its true colours and patterns and whether or not it is camouflaged against its natural background. The geographical area covered in the book includes the Atlantic coastal waters of the United States and Canada north of Chesapeake Bay; the Mediterranean; and from Gibraltar north to the Arctic, including all the coasts of Europe.