Approx. 1,200 nudibranchs from around the world with approx. 2,500 photographs. The quality of the photographs is unsurpassed in color rendition and resolution. The book's authors have gone to great lengths to demonstrate locational color variation within a species, a feature that is sure to be appreciated. This book is a must for any and all sea slug enthusiasts and is the perfect guide for divers, snorkelers, field workers, biologists, naturalists, scientists and photographers.