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Crocodile vs. Alligator — What's the Difference?

By Tayyaba Rehman — Updated on September 16, 2023
Crocodile vs. Alligator — What's the Difference?

Difference Between Crocodile and Alligator

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Key Differences

Crocodiles and alligators are both large reptiles from the order Crocodylia, but they belong to different families. While crocodiles can be found in various parts of the world, including Africa, Asia, and the Americas, alligators are primarily limited to the southeastern U.S. and a small region in China.
A notable difference between crocodiles and alligators is their habitat preference. Crocodiles tend to prefer saltwater habitats, like estuaries and coastal regions, although they can also be found in freshwater. Alligators, on the other hand, are predominantly freshwater creatures, frequenting swamps, marshes, and rivers.
In terms of physical appearance, the shape of their snouts distinguishes the two. Crocodiles generally have a V-shaped, narrow snout, while alligators possess a broader, U-shaped snout. This variation often correlates with their prey, with crocodiles having a diet that includes a wider variety of animals.
Another distinct difference is in their interaction with humans. Crocodiles, especially saltwater crocodiles, are considered more aggressive and more likely to attack humans than alligators. Although alligator attacks do occur, they are less frequent and typically result from provocation or the animal feeling threatened.
When observing them at rest with their jaws closed, one can notice that in a crocodile, the upper and lower teeth interlock and are visible, presenting a more jagged look. In an alligator, the upper teeth usually cover the lower ones when the mouth is shut.
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Comparison Chart

Geographic Distribution

Found globally (Africa, Asia, Americas)
Primarily southeastern U.S. and China

Habitat

Mostly saltwater but also freshwater
Predominantly freshwater

Snout Shape

V-shaped and narrow
U-shaped and broad

Aggressiveness

Generally more aggressive
Less aggressive unless provoked

Teeth Visibility

Both upper and lower teeth visible when mouth is closed
Only upper teeth usually visible when mouth is closed

Compare with Definitions

Crocodile

A large aquatic reptile with a V-shaped snout, belonging to the family Crocodylidae.
The Nile crocodile is one of the deadliest predators in Africa.

Alligator

An animal whose upper teeth cover the lower ones when its mouth is shut.
Observing from a distance, the alligator's closed mouth hid most of its teeth.

Crocodile

A creature known for its formidable strength and often found in saltwater habitats.
The crocodile basked on the riverbank, absorbing the sun's warmth.

Alligator

A large aquatic reptile with a U-shaped snout, primarily found in the U.S. and China.
The alligator slid silently into the murky swamp waters.

Crocodile

An ancient reptile that has existed for millions of years and is found globally.
Fossils show that crocodile species were present during the time of the dinosaurs.

Alligator

A member of the family Alligatoridae, mostly residing in freshwater habitats.
The bayou was home to numerous alligator families.

Crocodile

A carnivorous animal with powerful jaws and sharp teeth.
The crocodile swiftly closed its jaws, capturing its prey.

Alligator

A reptilian carnivore known for its armored body and strong tail.
With a swift movement, the alligator used its tail to knock the boat.

Crocodile

Crocodiles (family Crocodylidae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. The term crocodile is sometimes used even more loosely to include all extant members of the order Crocodilia, which includes the alligators and caimans (family Alligatoridae), the gharial and false gharial (family Gavialidae), and all other living and fossil Crocodylomorpha.

Alligator

An alligator is a crocodilian in the genus Alligator of the family Alligatoridae. The two extant species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis).

Crocodile

Any of various large aquatic reptiles of the family Crocodylidae that are native to tropical and subtropical regions and have thick, armorlike skin and long tapering jaws.

Alligator

Either of two large semiaquatic reptiles, Alligator mississipiensis of the southeast United States or A. sinensis of China, having sharp teeth and powerful jaws. They differ from crocodiles in having a broader, shorter snout.

Crocodile

A crocodilian reptile, such as an alligator, caiman, or gharial.

Alligator

Leather made from the hide of one of these reptiles.

Crocodile

Leather made from crocodile skin.

Alligator

A tool or fastener having strong, adjustable, often toothed jaws.

Crocodile

Chiefly British A line of people, especially pupils or choir members, standing two abreast.

Alligator

Either of two species of large amphibious reptile, Alligator mississippiensis or Alligator sinensis, in the genus Alligator within order Crocodilia, which have sharp teeth and very strong jaws and are native to the Americas and China, respectively.
All you could see of the alligator were two eyes above the water, then suddenly it snatched up and caught the poor bird with strong jaws full of sharp teeth.

Crocodile

Any of the predatory amphibious reptiles of the family Crocodylidae; (loosely) a crocodilian, any species of the order Crocodilia, which also includes the alligators, caimans and gavials.

Alligator

(paleontology) A member of the family Alligatoridae, which includes the caimans.

Crocodile

A long line or procession of people (especially children) walking together.

Alligator

(Nigeria) dwarf crocodile (Osteolaemus tetraspis)

Crocodile

(logic) A fallacious dilemma, mythically supposed to have been first used by a crocodile.

Alligator

(formerly) Applied to any species of crocodile.

Crocodile

(intransitive) To speak one's native language at an Esperanto-language gathering, rather than Esperanto.

Alligator

Any of various machines with strong jaws, one of which opens like the movable jaw of an alligator.

Crocodile

A large reptile of the genus Crocodilus, of several species. They grow to the length of sixteen or eighteen feet, and inhabit the large rivers of Africa, Asia, and America. The eggs, laid in the sand, are hatched by the sun's heat. The best known species is that of the Nile (Crocodilus vulgaris, or Crocodilus Niloticus). The Florida crocodile (Crocodilus Americanus) is much less common than the alligator and has longer jaws. The name is also sometimes applied to the species of other related genera, as the gavial and the alligator.

Alligator

(metalworking) A form of squeezer for the puddle ball.

Crocodile

A fallacious dilemma, mythically supposed to have been first used by a crocodile.

Alligator

(mining) A rock breaker.

Crocodile

Large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates; of sluggish tropical waters

Alligator

(printing) A kind of job press.

Crocodile

A reptile that displays visible interlocking teeth when its mouth is closed.
Even with its mouth closed, the crocodile's menacing teeth were evident.

Alligator

Any of various vehicles that have relatively long, low noses in front of a cab or other, usually windowed, structure.

Alligator

(obsolete) One who binds or ties.

Alligator

To crack in a pattern resembling an alligator's skin.

Alligator

Used in a common chronometric counting scheme, in which the speaker counts out loud, saying the word "alligator" between the numbers so that each number is spoken approximately one second after the last one.

Alligator

A large carnivorous reptile of the Crocodile family, peculiar to America. It has a shorter and broader snout than the crocodile, and the large teeth of the lower jaw shut into pits in the upper jaw, which has no marginal notches. Besides the common species of the southern United States, there are allied species in South America.

Alligator

Any machine with strong jaws, one of which opens like the movable jaw of an alligator

Alligator

To form shallow cracks in a reticulated pattern on the surface, or in a coating on the surface, of an object.

Alligator

Leather made from alligator's hide

Alligator

Either of two amphibious reptiles related to crocodiles but with with shorter broader snouts

Alligator

Of paint, varnish, or the like: to crack and acquire the appearance of alligator hide, as from weathering or improper application

Alligator

A creature less aggressive than crocodiles but still considered a top predator in its ecosystem.
Despite its calm demeanor, the alligator can be a formidable hunter.

Common Curiosities

What's the primary difference between a crocodile and an alligator?

The crocodile has a V-shaped snout and is found globally, while the alligator has a U-shaped snout and is mainly found in the U.S. and China.

Where can you commonly find crocodiles in the wild?

Crocodiles are found in various parts of the world, including Africa, Asia, and the Americas, while alligators are more localized.

Do both crocodiles and alligators live in saltwater?

While crocodiles are often found in saltwater habitats, alligators predominantly reside in freshwater.

Is it true that alligators rarely attack humans unless provoked?

Yes, while alligator attacks on humans do occur, they're typically less frequent and often result from provocation, whereas crocodiles are more aggressive.

Which one has a broader snout?

The alligator has a broader, U-shaped snout, while the crocodile has a narrower, V-shaped snout.

Which one is more aggressive towards humans?

Generally, crocodiles are considered more aggressive towards humans than alligators.

How can you differentiate them based on their teeth?

With a crocodile, both upper and lower teeth are visible when its mouth is closed, while in an alligator, usually only the upper teeth show.

Can crocodiles tolerate saltwater due to special glands?

Yes, crocodiles have special glands that excrete salt, allowing them to live in saltwater environments, while alligators have these glands but they're less functional.

Are there places in the world where both creatures coexist?

Yes, in places like Florida, both crocodiles and alligators can be found, although they generally inhabit different areas.

Do these animals have any natural predators?

While fully grown crocodiles and alligators have few natural predators, their eggs and young can be preyed upon by various animals.

Are alligators exclusive to the United States?

No, while alligators are primarily found in the southeastern U.S., they're also found in a small region in China. Crocodiles have a wider distribution.

Which is older in terms of evolutionary history?

Both crocodiles and alligators have ancient lineages, but crocodiles are believed to have appeared earlier than alligators in evolutionary history.

What are the primary prey for these creatures?

Both crocodiles and alligators are carnivores, feeding on fish, birds, and mammals. However, the specific prey can vary based on size and location.

Are there any conservation efforts for these reptiles?

Yes, both crocodiles and alligators have been subjects of conservation efforts due to habitat loss and hunting.

Can both these creatures live in captivity or zoos?

Yes, both crocodiles and alligators are kept in captivity for conservation, research, and educational purposes.

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Author Spotlight

Written by
Tayyaba Rehman
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to askdifference.com. As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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