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Crocodiles are large aquatic reptiles known for their powerful jaws, scaly skin, and distinctive long tails. They belong to the family Crocodylidae and are part of the order Crocodilia, which also includes alligators, caimans, and gharials. Native to tropical regions around the world, crocodiles inhabit freshwater environments such as rivers, lakes, and wetlands. They are apex predators that feed on a variety of prey, including fish, birds, and mammals. Crocodiles have a complex social hierarchy and display sophisticated behaviors, such as tool use and cooperative hunting. Their population is threatened by habitat loss, pollution, and overhunting, and they are protected under international law.