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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 an informal group, unified only by their reliance on marine ...
Marine life, sea life, or ocean life is the plants, animals, and other organisms that live in the salt water of seas or oceans, or the brackish water of coastal estuaries. At a fundamental level, marine life affects the nature of the planet. Marine organisms, mostly microorganisms, produce oxygen and sequester carbon.
A common bottlenose dolphin (Tursiops truncatus). A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).
Blainville's beaked whale, Mesoplodon densirostris DD. Gervais' beaked whale, Mesoplodon europaeus DD. Ginkgo-toothed beaked whale, Mesoplodon ginkgodens DD. Gray's beaked whale, Mesoplodon grayi DD. Hector's beaked whale, Mesoplodon hectori DD. Deraniyagala's beaked whale, Mesoplodon hotaula NE.
National Geographic Kids Video 51912 Really Wild Animals: Secret Weapons and Great Escapes National Geographic Kids Video 51916 Animal Holiday 1997 - 500 0-7922-5216-0 National Geographic Kids Video 51936 World's Last Great Places: Everglades: Secrets of the Swamp 51978 Video Classics: Save the Panda 1983 1995 60 0-7922-2999-1
An aquatic animal is any animal, whether vertebrate or invertebrate, that lives in bodies of water for all or most of its lifetime. [1] Aquatic animals generally conduct gas exchange in water by extracting dissolved oxygen via specialised respiratory organs called gills, through the skin or across enteral mucosae, although some are evolved from ...
The opening episode shows how ocean life is regulated around the globe by currents and the varying position of the Sun. Near a Pacific seamount , there is a large concentration of marine animals because when the current makes contact with the submerged rock, it forces upwards plankton and other organisms.
The terms "the ocean" or "the sea" used without specification refer to the interconnected body of salt water covering the majority of Earth's surface. [10][11] It includes the Pacific, Atlantic, Indian, Southern/Antarctic, and Arctic oceans. [19] As a general term, "the ocean" and "the sea" are often interchangeable.