The American alligator, known to scientists as Alligator mississippiensis, is at the top of the food chain. Called an apex predator, American alligator adults feed on virtually every other creature that shares their habitat, but they fear nothing except for humans and larger alligators. However, its young are not so safe, and many baby alligators are consumed by a variety of aquatic predators.

Fish and turtles are the most important prey for most alligators, but they are not fussy eaters. Other common prey species include snakes, frogs, toads, salamanders, birds, lizards, beavers, raccoons, nutria, rats, crustaceans, mollusks, insects and smaller alligators. Young alligators feed on smaller prey, including insects, frogs and fish. Alligators of all ages adapt to local food sources, but they are strictly carnivorous and do not eat vegetation.

Wading birds, snakes, large fish, turtles, raccoons, foxes and larger alligators hunt young alligators. As they grow, young alligators add more and larger prey to their list of acceptable food. Concurrently, alligators fear fewer predators as they grow.

Alligators are an important part of freshwater ecosystems as they help to maintain balance among the populations of small animals. Additionally, turtles and some other animals deposit their eggs in alligator nests.