Crocodilians are a group of reptiles that includes crocodiles, alligators, caimans, and gharials. They are known for their long bodies, powerful jaws, and tough, scaly skin. These animals are primarily found in tropical and subtropical regions, often living in freshwater habitats like rivers, lakes, and swamps. Crocodilians are excellent swimmers and can hold their breath underwater for long periods. These reptiles are also fascinating because they are closely related to birds and share a common ancestor. Crocodilians are carnivorous, feeding on fish, birds, and small mammals. They play an important role in their ecosystems by helping to control prey populations and maintain the health of their habitats.