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Orca, also known as killer whales, are a species of marine mammal belonging to the family Delphinidae. They are highly intelligent and social animals, living in complex matriarchal groups called pods. Adult orcas can reach lengths of up to 30 feet and weigh as much as 6 tons. Their distinctive black and white coloration makes them easily recognizable. Orcas have a diverse diet, feeding on fish, seals, sea lions, and even large whales. They are known for their impressive hunting techniques and cooperative behavior while hunting in pods. Orcas can be found in all oceans of the world, but they prefer cold, coastal waters. In terms of classification, orcas belong to the order Cetacea, which includes all whales, dolphins, and porpoises. As marine mammals, they share common characteristics with other mammals such as nursing their young with milk, having lungs for breathing air, and being warm-blooded. Within the context of animals classification, orcas are a unique and fascinating species that are well-adapted to life in the ocean. Overall, orcas are an important part of the marine ecosystem and play a vital role in maintaining the balance of their environment. Their complex social structure, intelligence, and hunting skills make them one of the most intriguing and captivating species in the animal kingdom.