An Alligator's a crocodilian in the genus Alligator of the family Alligatoridae. The name alligator's an anglicized form of the Spanish el lagarto (the lizard), the name by which early Spanish explorers and settlers in Florida called the alligator. There're two living alligator species: the American alligator (Alligator mississippiensis) and the Chinese alligator (Alligator sinensis). There're many adaptations for the American alligator. Baby alligators have an egg tooth that helps them get ou… (More on Alligator)