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Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.
Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans (whales, dolphins and porpoises), pinnipeds (seals, sea lions and walruses), sirenians (manatees and dugongs), sea otters and polar bears. They are an informal group, unified only by their reliance on marine ...
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The Ocean World of Jacques Cousteau by Jacques Cousteau is an encyclopedia in 21 volumes, that forms an encyclopedia of marine life. [ 1 ] It was published between 1973 and 1978.
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An orca breaching in Hood Canal. The marine mammals of the Salish Sea are numerous and diverse, both in taxonomy and morphology. A total of six species of pinnipeds, eight species of baleen whales, seventeen species of toothed whales, and one mustelid (the sea otter) inhabiting the local waters of the Salish Sea and the outer coastal waters over the continental shelf off Washington and British ...
Habitat: Neritic marine, oceanic marine, intertidal marine, coastal marine, and other [6] Diet: Bivalve mollusks, as well as other invertebrates, slow-moving fish, and occasionally birds, seals, and other marine mammals [6] VU 112,500 [6]
Fossils have been found in marine strata. The nares are retracted and the orbits are raised like in other aquatic mammals. Levels of stable isotopes in their tooth enamel suggest an aquatic diet and environment (carbon and oxygen) and fresh or brackish water (strontium). Their spongy bone structure is similar to that of cetaceans.