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May 23, 2024 · 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.
May 23, 2024 · Footnotes. References. Further reading. External links. List of cetaceans. Cetacea is an infraorder that comprises the 94 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other in the Eocene some 50 million years ago (mya).
May 7, 2024 · Marine mammals articles from across Nature Portfolio. Marine mammals are those whose life cycle is at least in part dependent on the ocean. They include cetaceans, such as whales and...
May 7, 2024 · The Society for Marine Mammalogy’s (SMM) Committee on Taxonomy, chaired by Patty Rosel, produces the official list of marine mammal species and subspecies. The IUCN Cetacean Specialist Group follows the SMM list including when identifying taxonomic units to be assessed for the Red List.
4 days ago · Whales (order Cetacea). whale, any of the larger species of aquatic mammals belonging to the order Cetacea. The term whale can be used in reference to any cetacean, including porpoises and dolphins, but in general it is applied to those more than 3 metres (10 feet) long.
- The Editors of Encyclopaedia Britannica
May 23, 2024 · The blue whale ( Balaenoptera musculus) is a marine mammal and a baleen whale. Reaching a maximum confirmed length of 29.9 meters (98 ft) and weighing up to 199 tonnes (196 long tons; 219 short tons), it is the largest animal known ever to have existed.
May 23, 2024 · The Cetacea (whales, dolphins and porpoises) currently include 89 species that inhabit the world's oceans, lakes and rivers. Some are cosmopolitan, occurring in marine waters from pole to pole, while others are restricted by ecology and population status to small ranges of a few thousand square kilometers or less.
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