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Marine Mammals are a group of mammals that are adapted to life in aquatic environments, specifically the marine environment. They belong to the larger class of mammals, which are characterized by features such as hair, mammary glands, and three middle ear bones. Within the classification system, they fall under the subclassification of mammals known as Mammalia. One specific group of marine mammals are walruses, which are known for their distinctive tusks and whiskers. Walruses are well adapted to life in the Arctic waters, with thick layers of blubber that provide insulation and buoyancy, and specialized flippers that allow them to swim efficiently. Marine mammals are diverse and include a variety of species such as whales, dolphins, seals, sea lions, manatees, and dugongs. They have evolved various adaptations to survive in the marine environment, such as the ability to hold their breath for extended periods of time, specialized sensory systems for navigating underwater, and unique reproductive strategies. As members of the mammal class, marine mammals share common characteristics with other mammals, such as being warm-blooded, having a four-chambered heart, and producing milk to nurse their young. However, their adaptation to life in the marine environment sets them apart from other mammals, making them a distinct group within the larger classification system.