What Are The Different Types Of Fish Scales?

Quick Read show Introduction Types of Fish Scales Placoid Scales Ganoid Scales Ctenoid Scales Cycloid Scales Scutes Functions of Fish Scales Protection Buoyancy Temperature Regulation



Sobat Penurut, have you ever wondered why fish have scales? Fish scales are not just for decoration, they serve a variety of important purposes. In addition to protecting fish from predators, scales can also help with buoyancy and temperature regulation. In this article, we will explore the different types of fish scales and their functions.

Types of Fish Scales

Placoid Scales

Placoid scales, also known as dermal denticles, are found on cartilaginous fish such as sharks and rays. These scales are small, tooth-like structures that are embedded in the skin. Placoid scales are different from other types of scales because they are covered in enamel, the same material that makes up teeth.

Ganoid Scales

Ganoid scales are found on primitive bony fish such as sturgeons and gars. These scales are thick and heavy, and are made up of a bony layer covered in a layer of enamel. Ganoid scales are diamond-shaped and overlap like shingles on a roof.

Ctenoid Scales

Ctenoid scales are found on most modern bony fish. These scales are thin and flexible, and are made up of a bony layer covered in a layer of enamel. Ctenoid scales have tiny spines or “teeth” along their edges, which can help protect fish from predators.

Cycloid Scales

Cycloid scales are also found on modern bony fish. These scales are similar to ctenoid scales, but they have smooth edges instead of tiny spines. Cycloid scales are round or oval-shaped and overlap like shingles on a roof.


Scutes are large, plate-like scales that are found on some fish, such as catfish and sturgeon. These scales are often used for defense, and can be very tough and difficult to penetrate.

Functions of Fish Scales


One of the main functions of fish scales is to protect fish from predators. Scales can be tough and difficult to penetrate, making it harder for predators to bite or swallow fish.


Fish scales can also help with buoyancy. By changing the angle of their scales, fish can adjust their position in the water and maintain their desired depth.

Temperature Regulation

Some fish scales, such as placoid scales, can help with temperature regulation. These scales are covered in enamel, which can help insulate the fish and keep it warm in cold water.

Tabel Of Types of Fish Scales

Type of Scale Examples
Placoid Sharks, Rays
Ganoid Sturgeons, Gars
Ctenoid Most modern bony fish
Cycloid Most modern bony fish
Scutes Catfish, Sturgeon

FAQ About Fish Scales

1. Do all fish have scales?

No, not all fish have scales. Some fish, such as eels and catfish, have smooth skin instead.

2. What are fish scales made of?

Fish scales are made of a variety of materials, including bone, enamel, and dentin.

3. Can fish scales regenerate?

Yes, some fish can regenerate their scales if they are damaged or lost. The rate of regeneration varies depending on the type of fish.

4. Do fish scales grow with the fish?

Yes, fish scales grow with the fish. As a fish grows, its scales become larger and thicker.

5. How do fish scales help with swimming?

Fish can adjust the angle of their scales to help with buoyancy and maintain their desired depth in the water.

6. Can fish scales be used for anything besides protection?

Yes, some fish scales, such as placoid scales, can also help with temperature regulation.

7. Are there any downsides to having scales?

Scales can make fish more visible to predators, and can also slow fish down when they are swimming.


Nah, that’s all about the different types of fish scales. Fish scales are an important part of a fish’s anatomy, serving a variety of functions including protection, buoyancy, and temperature regulation. By understanding the different types of fish scales, we can gain a better appreciation for these fascinating creatures of the sea.

If you’re interested in learning more about fish and their anatomy, check out our other articles on marine biology and oceanography. And don’t forget to get out there and explore the ocean for yourself!


The information in this article is for educational purposes only and should not be used as a substitute for professional advice. Always consult with a qualified expert before making any decisions regarding your health or the health of your pets.


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