Alligatoridae
Alligators and Caimans make up the second largest family of the crocodilians, Alligatoridae. There are 4 genera and about 7 known species of Alligatorids. Alligatorids range in size depending on species. The Chinese alligator (Aligator sinensis) is usually about  while the American Alligator (A. mississippiensis) is usually . The largest American alligator was  long. The Black Caiman of the Amazon can reach as much as .