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Dolphins are intelligent and highly social marine mammals known for their acrobatic displays and playful behavior. They belong to the family Delphinidae, which includes over 30 species, such as the bottlenose dolphin, orca (killer whale), and pilot whale. Dolphins possess a streamlined body, a prominent dorsal fin, and a distinctive beak-like snout. They are found worldwide in seas and oceans, ranging from shallow coastal areas to deep offshore waters. Dolphins communicate using a complex system of clicks, whistles, and body movements. They use echolocation to navigate and locate prey, emitting sounds that bounce off objects in their environment and return to their melon (a fat-filled organ in their forehead) to interpret the echoes. Dolphins primarily feed on fish and squid. Dolphins have a strong social structure, often living in pods of up to a dozen individuals, although larger groups can form in favorable conditions. They exhibit various forms of cooperative behavior, such as hunting, playing, and protecting one another. Some dolphin species display remarkable intelligence, exhibiting problem-solving abilities, tool use, and even cultural transmission of behaviors. Dolphins face numerous threats from human activities, including habitat loss, pollution, entanglement in fishing gear, and intentional harm. Conservation efforts are underway to protect dolphin populations and their habitats, with many countries implementing measures such as marine protected areas and regulations on hunting and fishing.