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Marine Mammals are a group of mammals that are adapted to life in aquatic environments, specifically the marine environment. They include species such as whales, dolphins, porpoises, seals, sea lions, walruses, manatees, and dugongs. These mammals have evolved various physiological and behavioral adaptations that allow them to thrive in the marine environment, including the ability to hold their breath for extended periods of time, specialized insulation to maintain body temperature in cold water, and the ability to navigate and communicate using echolocation. As a subcategory of Endangered Animals, Marine Mammals include several species that are at risk of extinction due to various threats such as habitat loss, pollution, climate change, and human activities such as hunting and bycatch in fishing gear. One such example is the Blue Whale, which is the largest animal ever known to have existed on Earth, but was hunted to near extinction during the 20th century. Today, conservation efforts are underway to protect these magnificent creatures and help them recover from the brink of extinction. Marine Mammals, as a subcategory of Mammals, share many characteristics with other mammals, such as being warm-blooded, having hair or fur, and nursing their young with milk produced by the mother's body. However, Marine Mammals are unique in their adaptation to life in the marine environment, making them a fascinating and important group of animals to study and protect.