What Is the Difference Between a Crocodile and an Alligator?

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While they look similar to the untrained eye, crocodiles and alligators do have distinct differences. These two types of reptiles are found in different parts of the world, and have unique physical distinctions, including different shaped snouts. Both are part of the Crocodilia order, along with caimans and gharials, which also share a superficial resemblance.

Snout Differences

In terms of physical differences, observing the snout — the mouth and nose — is one of the simplest ways to distinguish between a crocodile and an alligator. Crocodiles have long, narrow, V-shaped snouts, while those of alligators are wider and U-shaped. These differences are indicative of the type of diet that each species favors. The wide snout of the alligator packs more crushing power, making it easier to secure prey such as turtles. By contrast, the narrow snout of the crocodile is suited for fish as well as small mammals.

Jaw Differences

The jaws found on a typical crocodile and an alligator are also different. The upper and lower jaws of the crocodile are essentially the same width, with the teeth exposed in an interlocking pattern. They also have a large, protruding fourth tooth on the lower jaw that is accommodated by depressions in the upper jaw just behind the nostrils. The alligator, however, has a wider upper jaw, allowing the lower teeth to fit into it snugly, effectively hiding them from view. Only the teeth of the upper jaw are exposed along the lower jaw line.

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