Interesting Shark Facts

What are the 3 features that all sharks have in common

Sharks are the most fascinating creature you can ever see in the underwater world. Inhabiting the world’s oceans for millions of years, they have evolved into over 500 species that differ in every aspect, including behavior, color, body type, and shape. Even the size and the diet of each species of shark can differ from one species to another.

With all that said, it often intrigues a person to think about the features all sharks have in common. It’ll be interesting to learn about that. So, here we are presenting you with the 3 features that all sharks have in common.

What do all sharks have in common?

To be honest, sharks are mysterious creatures of the sea, and each one of their characteristics reveals a different aspect of their lives. For example, the fact that you will see sharks of varying sizes, as large as over 60 feet and as small as a few inches or the size of a pencil.

However, despite being widespread throughout the world oceans and having different habitats and requirements, there are certain things that are shared by all species. Here we are going to highlight the 3 features that you should know all species of sharks have in common.

Cartilage Skeleton

The 1st feature that may surprise you as well is that all sharks, no matter the size, weight, or where they live, share similar autonomy. Sharks do not have bones, but they all have cartilage skeletons. For those not familiar with shark cartilage, it is the tissue that provides support and strength to shark fins, similar to how bones function in humans.

Dermal Denticles

You may not have heard of this before, but from the appearance of sharks, we all feel that the skin is smooth, but in actuality, the skin of sharks has dermal denticles, or you can say skin teeth. No matter which species of sharks you take, their skin will be covered with thousands of tiny dermal denticles.

If you brush your hand across the shark’s skin toward the tail, the spines of these denticles will feel smooth, while if you brush towards the head, they will feel sandpapery.

Dynamic Fins

The 3rd feature that all sharks have in common is that they all have fins on their bodies. Sharks without fins may not be able to swim and will sink to death. It is important to remember that fins can come in different types, such as dorsal, pectoral, caudal, anal, and pelvic fins, and each species will have different numbers of them. Shark fins serve a variety of functions, including stabilization, steering, lifting, and propulsion. To get an idea, check out the function of the dorsal fins. 

Those familiar with the term “shark finning” know that it describes the practice of removing shark fins from shark bodies and then tossing them alive into the waters, where they drown and die. Shark fins are then used for a range of purposes together with commercial use. This practice, however, is brutal and is prohibited in many countries.


It is astonishing how little we know about sharks, even though they have been around for millions of years. It’s important to recognize that despite being diversified into hundreds of different species, many things remain the same, such as the three characteristics discussed above. It’s never too late to learn about these amazing creatures of the ocean; you will surely find plenty of information regarding sharks on this site.

About the author

Ameer Hamza

Ameer Hamza is a well-versed content writer who has been a part of the writing industry for over 4 years and part of Talha Saif Enterprises as an Author for over a year. Through his love of writing, he has developed his own writing style. He enjoys writing articles and blog posts that provide readers with detailed and accurate information. The knowledge he gained from his education helped him tackle many different subjects without any problem. As an avid reader and technology geek, Ameer is always on the lookout for the latest innovations.