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.