1 Marine mammals are mammals, ie warm-blooded animals characterized by the production of milk in the female mammary glands, which spend the majority of their lives in or close to the sea. By definition, all of these animals are air breathers. They include cetaceans, pinnipeds, sirenians, sea otters, and polar bears. Almost all marine mammals are to a greater or lesser extent endangered species (Endangered Species, International Protection). 2 The term ‘cetaceans’ encompasses whales, dolphins, and porpoises, thus referring to the oldest, most diverse, and most...
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