Preface Using This Book to Identify Marine Mammals What Are Marine Mammals? Marine Adaptations Whales, Dolphins, and Porpoises: Cetaceans Family Characteristics of Alaska Cetaceans Morphology of Cetaceans Common Cetaceans of Alaska Bowhead Whale North Pacific Right Whale Blue Whale Fin Whale Sei Whale Minke Whale Humpback Whale Gray Whale Sperm Whale Beluga Baird''s Beaked (Bottlenose) Whale Cuvier''s Beaked (Goosebeak) Whale Stejneger''s (Bering Sea) Beaked Whale Killer Whale (Orca) Pacific White-Sided Dolphin Dall''s Porpoise Harbor Porpoise Seals, Sea Lions, and Walrus: Pinnipeds Family Characteristics of Alaska Pinnipeds Morphology of Pinnipeds Common Pinnipeds of Alaska Steller (Northern) Sea Lion California Sea Lion Northern Fur Seal Northern Elephant Seal Bearded Seal Harbor Seal Ribbon Seal Spotted (Largha) Seal Ringed Seal Pacific Walrus Marine Fissipeds Other Mammals Polar Bear Sea Otter Terms Used in This Guide Marine Mammal Names