Alligators and Crocodiles Have Scales? (Croc Scutes Explained) – Fauna Facts (2024)

Alligators and Crocodiles have bony protective scales called “scutes.” These scales are different from typical reptile scales because they are so wide and bony.

The scales of crocodiles and alligators are not fused with the skeleton, giving the crocodile better flexibility. Each scute is a separate material, with several layers below it. While some patterns repeat themselves, no two crocodiles have the same scute patterns.

Alligators and Crocodiles Have Scales? (Croc Scutes Explained) – Fauna Facts (1)

What Are Crocodile Scales For?

The main function of crocodile scales is to prevent water loss. The scutes are largest at the back because it is the part that receives the most exposure under the sun. Its thickness prevents the risk of drying out.

Crocodiles and alligators have their backs exposed to the sun all day long. They evolved to protect that part of their body, and it is why they have back armor.

The areas with the least scutes are around the shoulders and hips, because the crocodile needs better flexibility around these areas. The belly also has thin scales, making it a vulnerable part of the animal.

Are Alligator and Crocodile Scales Sensitive?

Crocodile and alligator scutes are sensitive to touch. These scales are not just armor, but they also have nerves endings that can transmit a signal to the brain.

The scutes of crocodiles and alligators make for excellent body armor, but they also rest on nerve endings that the animal can use to sense its surroundings.

Each crocodile has thousands of scales, and each scale has a nerve ending. It is widely believed in the scientific community that these nerve endings begin to develop before they even hatch.

These nerve endings start to develop from the head, but as the animal matures, the nerve endings grow down to the crocodile’s body to the end of the tail.

These nerves are not just capable of sensing touch, but they can also “feel” temperature and even determine pH levels.This means that the crocodile’s scutes function almost like skin. It can feel the temperature, which tells the crocodile when it is time to bask under the sun or go back in the water.

What Are Crocodile and Alligator Scutes For?

Crocodiles and alligators use their scutes for hunting. Scutes are so sensitive because of the nerve endings under them that an alligator can use their scutes to detect tiny ripples in the water.

In many TV shows, animal channels often show crocodiles hunting in the day. The truth is they prefer hunting at night when it is dark.

Unlike some snakes, crocodiles do not have a heat-sensing vision. Instead, they use the sensitivity of their scutes to detect movement. These scutes can feel a tiny ripple underwater if an animal on land is drinking from it.

When a crocodile detects this movement, it can sneak up to the prey, and it does not even need to see the prey. Alligators and caimans only have these nerve spots around their faces, but crocodiles have them around their bodies.

Are Crocodile Scales Bulletproof?

No, crocodile skin or scale is not bulletproof. It is thick, but bullets can penetrate it. Crocodile skin is one of the toughest leathers out there, and it is why it is highly sought after.

The toughness of the scale varies from one area to another. The scutes from the back of the animal are the toughest, while those from the belly are the softest. The belly scales are similar to those of a snake.

Scutes from a crocodile’s back are as hard as a bone because they contain osteoderms. These are small bone deposits that make the scales almost impenetrable. Despite their toughness, even these scales are not bulletproof.

People who hunt crocodiles hunt with guns. Sometimes, the bullet may bounce. It happens when the shot is made from an angle. As such, it’s a common myth that croc scales are bulletproof.

How Big are Crocodile Scales?

Crocodile scales can grow up to five inches in width, depending on the age of the crocodile. Once a crocodile matures to 15 years, its growth rate slows down.

After around 15 years, crocodiles growth rate slows, although their scales continue to grow slowly. Crocodiles can reach a hundred years old, so the scutes have a long time to develop.

What are the Dark Spots on Alligator Scales?

Intergumentary Sensory Organs are small, dark spots found on an alligator’s face and mouth. A study published in the Journal of Experimental Biology explains that these spots contain lots of nerve endings and help the alligator with hunting and sensing their environments.

These touch sensors feel not only temperature and pH levels but also vibration, including the touch of human fingertips.

Integumentary sensor organs or ISOs are used for:

  • Provision of oily secretions
  • Detection of electric fields
  • Detection of water salinity
  • Detection of pressure and vibrations

Back in 2002, a biologist noted that alligators in a darkened aquarium responded to droplets of water. It happened despite the presence of other noises in the water. The alligators, upon hearing the droplet, turned to face the droplet’s location.

The conclusion was that the sensor in the alligator’s face is also a mechanism to detect vibration, even from a single drop. The biologist also found out that the spots are connected to the brain.

The study revealed a diverse collection of mechanoreceptors in these spots. These nerves respond to pressure. They also respond to vibrations within the 20 and 35 Hertz range. Some respond to the pressure that a human finger cannot detect.

More Amazing Facts about Alligators:

  • Do Alligators Hibernate?
  • Do Alligators Have Scales?
  • How Long can Alligators Hold Their Breath?
  • Are Alligators Dinosaurs?
  • How Fast can Alligators Swim?
  • How Fast Can Alligators Run?
  • How Far North do Alligators Live?
  • What do Alligators Eat?

Summary: Do Alligators and Crocodiles Have Scales?

Crocodiles have scales, and these scales are called scutes. The thickness of the scute varies from one area of the body to another, the thickest of which is at the back.

The scutes have nerve endings, which makes them sensitive to touch. It can also detect temperature and pH levels in the water. A crocodile’s scute is not bulletproof, but it can be thick like a bone because it has osteoderms.

Alligators and Crocodiles Have Scales? (Croc Scutes Explained) – Fauna Facts (2)

Stuart

Stuart is the editor of Fauna Facts. He edits our writers’ work as well as contributing his own content. Stuart is passionate about sustainable farming and animal welfare and has written extensively on cows and geese for the site.

Alligators and Crocodiles Have Scales? (Croc Scutes Explained) – Fauna Facts (2024)

FAQs

How do scales and scutes help alligators and crocodiles? ›

The skin of crocodiles and alligators protects against water loss via bony scales called scutes. Foy S, Oxford Scientific Films. The Grand Design: Form and Colour in Animals.

What are some facts about alligators vs crocodiles? ›

Fast Facts

The difference between alligators and crocodiles is often easy to spot once you get the hang of it. Alligators are dark colored with a broad, rounded snout and are usually found in fresh water. Crocodiles are grayish-green and prefer coastal, brackish and salt-water habitats.

What are 3 important facts about alligators? ›

Alligator Facts
  • The American alligator is classified by the US Fish and Wildlife Service as similarity of appearance to a threatened taxon. ...
  • Alligators are opportunistic feeders. ...
  • Female alligators rarely exceed 10 feet in length, but males can grow much larger.

Why do crocodiles have scutes? ›

Osteoderms are bony scutes embedded underneath the dermal layers of the skin acting as a protection of the alligator (Archosauria: Crocodylia) internal organs and tissues. Additionally, these scutes function as an aid in temperature regulation.

Do alligators have scutes? ›

Both males and females have an "armored" body with a muscular, flat tail. The skin on their back is armored with embedded bony plates called osteoderms or scutes. They have four short legs; the front legs have five toes while the back legs have only four toes.

What are the facts about crocodile scales? ›

The scales on the flanks and the neck tend to be round with a raised centre. Along the back and upper surfaces of the tail, the scales are raised in a very pronounced way. Bone may be deposited within the scales as discrete and isolated blocks, called “osteoderms”.

Are crocodile scales bulletproof? ›

Crocodilian skin is made up of osteoderms, bony armour plates. They're thick but not bullet proof, although they are thick and sturdy enough to prevent a small bullet to penetrate and not get embedded deeper. Crocodilian skin is made up of osteoderms, bony armour plates.

What kills more alligators or crocodiles? ›

Answer and Explanation: While both alligators and crocodiles look similar and can be dangerous to humans, crocodiles are far more dangerous. This is because crocodiles are known for being more aggressive and willing to attack humans rather than escape like the alligator.

Who would win, alligator vs crocodile? ›

"The biggest crocodiles in the world are larger than the biggest alligators," he said. "Saltwater crocs can get to almost 21ft long while alligators only get to almost 15ft long. So if the largest gator fought the largest croc, the croc would probably win."

What's more aggressive, an alligator or a crocodile? ›

Crocodiles are often regarded as much more aggressive than alligators. While you should avoid contact with both animals at all costs, alligators in the Everglades tend to be more docile than crocodiles, only attacking if hungry or provoked.

Do alligators live to be 100? ›

The record alligator taken in Louisiana was 19 feet 2 inches. Alligators live about as long as humans and average 70 years, but can be 100 years old, if they can survive a difficult life which starts with biting and fighting that never ends.

How old is a 1 foot alligator? ›

As the image explains, using the red line graph to represent the length to age comparison, an alligator grows very quickly from birth through age 5, growing an incredible one foot per year. Growth then slows slightly until age 10, when the alligator reaches approximately 8 feet in length.

What are alligator scales made of? ›

Reptilian scales are made of keratin, like hair, and found in an overlapping arrangement. This creates a sort of environmental shield for the animal. Snakes have special, elongated scales on their belly to help them crawl and climb.

How many scutes does a crocodile have? ›

The 60 (green) scute is cut on all Janamba-bred crocodiles. The year scutes (100T and 10S; yellow) allow the age of the animal to be determined. To save confusion, the 1, 10, 100, 9 and 90 scutes are never removed.

What is the function of the scutes? ›

A scute is an external bony plate on the surface of a fish. Scutes serve a protective function, acting as a body armor for fish against environmental abrasions and even predation. In some fishes, such as Alewife (Alosa pseudoharengus), scutes are a row of scales modified into sharp, protective plates.

Do crocodiles live for 100 years? ›

In the wild, the lifespan of a crocodile is often limited by adverse factors such as lack of food and chances of infection. But did you know that a crocodile kept in captivity can live for up to 100–120 years?

What is alligator scute? ›

A scute (/skjuːt/) or scutum (Latin: scutum; plural: scuta "shield") is a bony external plate or scale overlaid with horn, as on the shell of a turtle, the skin of crocodilians, and the feet of birds.

What attracts alligators to humans? ›

"Splashing in the water will attract an alligators interest, and if it perceives at that point in time that there's something smaller and weaker in the water, it might attack it," said Frank Mazzotti, professor of wildlife ecology and member of the "Croc Docs" at the University of Florida.

What are the 3 types of alligators? ›

The two extant species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis). Additionally, several extinct species of alligator are known from fossil remains.

What does a scute look like? ›

scute is a bony plate or shield-like scale, often found. on reptiles like turtles and tortoises. Each section of a. turtle's shell is known as a scute.

What is the function of the scales on an alligator? ›

Reptiles have a tough, dry, scaly skin that protects them from predators and allows them to live in dry places by reducing water loss. Reptilian scales are made of keratin, like hair, and found in an overlapping arrangement. This creates a sort of environmental shield for the animal.

How does scaly skin help crocodiles? ›

Reptiles are turtles, snakes, lizards, alligators and crocodiles. Unlike amphibians, reptiles breathe only through their lungs and have dry, scaly skin that prevents them from drying out.

How does a crocodile adapt to scales? ›

As members of such a long-surviving group, alligators and crocodiles have multiple adaptations in their skin, including flaps that make their eyes and ears watertight when diving and armored scales that protect the skin and avoid water loss. Don't let the rough texture of their skin fool you, though.

What's the difference between crocodile and alligator scales? ›

Alligator skin has smaller, more symmetrical scales with a smoother feel than crocodile. The scales are larger in the middle and become smaller as they move outwards. Hermès alligator bags are made from a single species, but two different crocodile species are used — Niloticus and Porosus.

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