This is the most comprehensive field guide ever compiled for identifying reef fishes from the Gulf of California to the Pacific coast of Panama, including offshore islands. It contains over 500 photographs of 400 species taken in their natural habitat. The book is dedicated to Baja Legend Alex Kerstitch and includes several of his drawings and photographs. The concise text accompanying each species portrait includes the fish's common, scientific and family names, size range, description, visually distinctive features, preferred habitat, typical behaviour, depth range, and geographical distribution.