Alligators are terrible and fierce. An alligator is a reptile that is related to the Crocodile and the cousin called a Caiman. On your planet Earth, a gator lives in the americas, asia, and africa's nile river. African alligators are extremely rare and not endangered, because of animal rescue heroes and park rangers. All alligators have a jaw that has a super duper strong bite. In the movie, After Earth, the gators evolved a sail on their back and two fangs on the top of their jaws. the gators in your world don't have both of these body parts.