The Order Crocodilia refers to a group of reptiles that are commonly known as crocodilians. There are several synonyms for the term crocodilian, including crocodile, alligator, caiman, and gharial. These animals are characterized by their scaly skin, powerful jaws, and ability to survive in both water and land habitats. The Order Crocodilia contains 24 known species, most of which are found in tropical regions such as Africa, Australia, and South America. While these animals are often feared by humans, they play an important role in their respective ecosystems as apex predators.