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Orcas, also known as killer whales, are a distinctive and well-known species of marine mammal that belong to the family Delphinidae, which also includes dolphins. They are the largest species in this family, and are easily recognized by their distinctive black and white coloration, tall dorsal fin, and robust body. Orcas are found throughout the world's oceans, from the Arctic and Antarctic regions to more temperate waters. They are highly social animals that live in groups called pods, which can range in size from a few individuals to several hundred. Orcas are also known for their complex social structures, with different pods exhibiting unique behaviors, dialects, and hunting strategies. In terms of their place in the animal kingdom, orcas belong to the class Mammalia, which includes all mammals. They are further classified as marine mammals, as they spend their entire lives in the ocean. As a type of whale, orcas share many characteristics with other whales, such as their large size, streamlined body shape, and use of echolocation for navigating and finding food. However, they are unique among whales in that they are toothed, and have a diet that consists primarily of fish and marine mammals. Overall, orcas are fascinating and complex animals that occupy an important place in the world's oceans. Their distinctive appearance, social behavior, and predatory skills make them one of the most captivating and well-known species of marine mammal.