Why the World's Biggest Sharks Love Mafia Island loading...
Why the World's Biggest Sharks Love Mafia Island
Scientists hope the whale sharks that live around the East African island will help them better understand how to preserve the species.
Divers Remove a Fist-Sized Hook From a Shark's Mouth–By Hand loading...
Divers Remove a Fist-Sized Hook From a Shark's Mouth–By Hand
Dramatic photos show a diver gently pulling a large hook out of a shark's mouth, but scientists say the act may not have been necessary.
7 Amazing Animal Organs People Don't Have loading...
7 Amazing Animal Organs People Don't Have
Under-eye "flashlights," venom glands, claspers. Nature abounds with body parts that aren't found in humans.
About Sharks

There are more than 450 species of sharks today including the great white, hammerhead and tiger shark. Species range in size from as small as 17 centimetres to 12 metres long. Sharks are usually found in oceans as deep as 2,000 meters.

Many sharks, are apex predators meaning they are at the top of the food chain in their environments. While some sharks are omnivores, most are carnivores and display an array of different feeding techniques.

Unlike other fish, sharks reproduce a small amount of well developed young. Most sharks live to be about 20 or 30. The largest shark, the whale shark, may live to be over 100 years old.

Despite what people believe, shark attacks on humans are unlikely. Out of the 450 species only four have been known to attack and kill people. In fact, sharks are threatened by humans due to habitat loss, coastal degradation and fishing. It is estimated that over 100 million sharks are killed each year.  

Newsletter

Never miss a Nat Geo moment

Your email address
Submit