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Marine mammals are warm-blooded, air-breathing creatures that inhabit Earth's oceans and seas. They belong to several distinct groups, including whales, dolphins, porpoises, seals, sea lions, walruses, manatees, and dugongs. These animals have evolved specialized adaptations for living in aquatic environments, such as streamlined bodies, limbs modified into flippers or fins, and the ability to regulate their buoyancy. They are highly intelligent and social creatures, capable of complex behaviors and communication. Many marine mammals also engage in long-distance migration and have been known to display intricate cultural traditions. Despite their remarkable adaptations and abilities, marine mammals face numerous threats from human activities such as pollution, habitat destruction, and climate change.