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Sharks are beautiful, enigmatic and extremely important animals that are often misunderstood.

In 2014 studies carried out by specialists and 5 of the worlds leading marine science bodies estimated that between 63 million and 273 million sharks are killed each year! Sharks are vital to ocean ecosystems; as apex predators they play a critical role in balancing marine ecosystems; their decline is having catastrophic consequences, and there is a very real danger that shark populations will totally collapse and extinction will follow. We have no way of knowing what that could mean for marine ecosystems, but scientists are predicting very serious consequences that will effect us all.


1. Sharks have been in our oceans for over 400 million years and have survived five mass extinction events.

2. There are over 400 species of shark that come in all different shapes and sizes from the tiny Lantern shark to the huge Whale Shark!

3. Sharks are constantly growing new teeth and can loose up 30,000 teeth in their lifetime.

4. A sharks skin is also made up of dermal denticles tiny teeth which is extremely streamlined and tough.

5. Some sharks lay eggs and others give birth to live young! 

6. A sharks skeleton is made up of cartilage not bone, making them lighter and more flexible in the water. 

7. Due to overfishing some shark species face extinction and populations are depleted by up to 97%

8. Sharks are top of the food chain in the ocean and help to regulate the oceans delicate ecosystem.

9. Sharks can sense your heartbeat through electromagnet sensors in their heads called Ampullae of Lorenzini

10. Sharks are fussy eaters, most sharks eat small fish and crustaceans, larger sharks may eat seals and turtles. 

One Ocean Diving program’s safety diver and shark behavior expert Ocean Ramsey swims with a shark in Hawaii.

Photo courtesy of ©juansharks and ©