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- Marine mammals are found in marine ecosystems around the globe. 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.
www.noaa.gov › education › resource-collectionsMarine mammals | National Oceanic and Atmospheric Administration
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Feb 1, 2019 · What is a marine mammal? What makes a marine mammal a marine mammal? They must meet the characteristics of all mammals — they breathe air through lungs, are warm-blooded, have hair (at some point during life), and produce milk to nurse their young — while also living most or all of their lives in or very near the ocean.
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 .
Jul 10, 2023 · Marine mammals are a diverse group of aquatic animals that depend on ocean ecosystems for their survival. There are approximately 126 extant species of marine mammals that are divided into five distinct groups: (1) pinnipeds: seals, sea lions, and walruses; (2) cetaceans: whales, dolphins, and porpoises; (3) sirenians: manatees and dugongs; (4 ...
What is MARINE MAMMAL? 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.
The term ‘marine mammals’ includes all mammals that live in either marine or freshwater environments and would be more correctly called aquatic mammals but they are almost always found in marine environments. Three distinct lineages of mammals have evolved to live in water: Cetacea – whales, dolphins and porpoises.
Dec 1, 2020 · 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. They are broken into three groups that share similar adaptations to their aquatic life, but that have very different origins and life patterns.
Updated: 02/16/2024. What is a Marine Mammal? Marine mammals are mammals that entirely or largely rely on marine ecosystems for life sustenance. These animals include...
