Explanation:

There are three groups (families) of crocodilians: the alligatoridae, which includes the alligator and the caimans; the crocodylidae, which includes the "true" crocodiles; and the gavialidae, which contains only the gharial.

Alligators live only in the southeastern USA and eastern China, whereas crocodiles can be found right across the world in Africa, Australia, Southeast Asia, North America, South America and Central America.

One of the main differences between alligators and crocodiles is the snout. The alligator's is broader and shaped like a U, whereas the crocodile’s is longer and narrower and more V-shaped.

Crocodiles have special glands in their tongues which excrete excess salt from their bodies. This means that they are capable of spending days, or even weeks at sea. Alligators have these glands as well but they don’t work so well, so they usually stick to freshwater habitat