Newly revised and updated with additional photographs and up-to-date names, this full-colour field guide to the marine life of coastal British Columbia, Alaska, Washington, Oregon and northern California is perfect for divers, boaters and beachcombers. It is a ready reference to more than 400 of the most common species: the fascinating local sponges, jellyfish, crabs, shrimp, barnacles, clams, snails, seals, fish, whales, sea algae and hundreds of other living things that can be observed and identified without being disturbed. The book is arranged for quick identification with colour-coded sections, full-colour photographs and comprehensive but concise information on size, range, habitat and facts of interest about each species. A glossary, checklist, reading list and full index are included.

This expanded third edition includes new material on identifying bivalves from their siphon shows, as well as current information on introduced and invasive marine species.

Rick M. Harbo, BSc, is the author of the bestselling Tidepool & Reef (Big Country Books, 1980), Shells & Shellfish of the Pacific Northwest (Harbour Publishing, 1997), Pacific Reef and Shore (Harbour Publishing, 2017) plus several pocket field guides to marine life of the Pacific Northwest (Harbour Publishing). Harbo is a diver and a retired senior marine biologist with Fisheries and Oceans Canada. He currently volunteers as a research associate with the Royal BC Museum. Harbo lives in Nanaimo, BC.