Book excerpt: This delightful field guide features 585 full-color photographs of marine and freshwater fishes, 30 photographs and 45 paintings of whales, dolphins, and porpoises, and 24 pictures of freshwater and saltwater habitats. 529 species are described in detailed written accounts-with information on measurements; body shape and color; scales, fins, and gills; habitat; range; and behavior-and 400 other species are briefly noted. Poisonous or otherwise dangerous fish are distinguished by a warning symbol.