A strikingly illustrated photographic identification guide to sea slugs in all their colourful varietyNudibranchs, or sea slugs, are a group of marine gastropod molluscs whose adults lack shells, an evolutionary loss that has led to a wide variety of body shapes, colours and colour patterns, making them popular with divers and underwater photographers. In this book, experienced nudibranch experts Bernard Picton and Christine Morrow provide an accessible and authoritative photographic identification guide for anyone interested in finding and identifying nudibranchs in the coastal waters of Britain, Ireland and Northwest Europe.Covers more than 195 species, each on its own two-page spreadIncludes in situ photos to aid finding nudibranchs under water and on the shoreFeatures photos of nudibranchs' distinctive spawn coils and studio photos showing detailed anatomyPresents key distinguishing features and essential information on size, habitat, diet and distribution