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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 a diverse group of mammals with unique physical adaptations that allow them to thrive in the marine environment with extreme temperatures, depths, pressure, and darkness. Marine mammals are classified into four different taxonomic groups: cetaceans (whales, dolphins, and porpoises), pinnipeds (seals, sea.
Marine mammals are a diverse grouping of animals that all depend on the sea for their existence. Although they are all classified as mammals, they are not necessarily directly related by an immediate common ancestor and have come to be dependent on the sea through convergent evolution.
Marine mammals are aquatic mammals that depend on ocean ecosystems. These animals can be broken up into four main groups which are the pinnipeds, cetaceans, sirenians, and fissipeds. 1. Pinnipeds. Sea Lion on a rock | image by Eva via Flickr | CC BY-ND 2.0. The pinniped group includes seals, sea lions and walruses.
Dec 1, 2020 · What are marine mammals? Marine mammals are warm-blooded vertebrates (animals with a backbone) that bear live young and nourish them with milk as land mammals do, but that spend most or all of their lives in the ocean.
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There are five groups of marine mammals: pinnipeds (or “flipper-footed” animals like seals, sea lions, fur seals and walruses), cetaceans (species that cannot survive on land, such as whales, dolphins and porpoises), sea otters (the smallest marine mammal), sirenians (warm water species such as dugongs and manatees) and polar bears (which ...
