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Aquatic Mammals Chart

This list follows the society s taxonomy regarding and subspecies. They are an informal group unified only by their reliance on marine environments for feeding.

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Cetaceans whales dolphins and porpoises pinnipeds seals sea lions and walruses sirenians manatees and dugongs and marine fissipeds polar bears and sea otters.

Aquatic mammals chart. Conservation status codes listed follow the iucn red list of threatened. Whales dolphins porpoises manatee and dugong are completely aquatic. Despite the diversity in anatomy seen between groups improved foraging efficiency has been the main driver in their evolution.

Aquatic and semiaquatic mammals are well adapted to life in the water with physical characteristics such as flippers webbed feet paddlelike tails and streamlined bodies. The level of dependence on the marine environment varies considerably with species. 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.

This is reflected in the footnotes. Seals sea lions walrus hippopotamus platypus otters beavers and. The committee on taxonomy chaired by patricia rosel produced the first official society for marine mammalogy list of marine mammal species and subspecies in 2010 consensus on some issues has not been possible.

The current version was updated in may 2020. Marine mammals form a diverse group of 129 species that rely on the ocean for their existence. The list is updated at least annually.

Marine mammals are classified into four different taxonomic groups.

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