This second, revised edition includes 35 species not included in the first edition, including 13 nudibranchs. Information on each species has been updated from the first edition. This is a beautiful, full color field guide describing 285 species of inshore, subtidal marine invertebrates that are commonly observed by biologists, divers and naturalists from the Gulf of Alaska to central Baja California. Each species is illustrated with a color photo and has a narrative which includes habitat, identification, depth, geographic range and size. Softback 7" x 9", 123 pages, 290 color plates, pictorial key and glossary.