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For the last 150 years, paleontologists have debated the origins of the great white shark . Many believe that they descended from the 50-foot megalodon, also known as the megatooth shark ( Carcharocles megalodon...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller than...
What is scarier: sharks or extinction? This video from Save Our Seas puts...
Dr. Mahmood Shivji explains how shark DNA is used as evidence to prosecute...

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What would happen if we let our fear of sharks lead people to kill them all? This is the question Joe Hanson asks in this video from PBS Digital Studios. Find out about how the removal of sharks affects the food web, ecosystem...
I want snack, so give me cookie! The cookie cutter shark ( Isistius...
For many years, shark fin soup has been a popular delicacy at weddings and...

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There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous...
What would you do if you came face to face with a shark ? Brian Skerry lives for these moments and is ready with his camera. Here he is seen photographing a large tiger shark on the seafloor near the...
How do we know where ocean animals swim day and night? Scientists are getting snapshots into the daily lives of whales , sharks , and even fish by tagging the animals to track their movements. You’ve...
It's hard to imagine a 2000-pound animal launching itself out of the water while hunting, but the great white shark does just that. This spectacular behavior is called breaching, and great white...
Sunday, November 21 marks World Fisheries Day , an annual occasion observed in many fishing communities around the world. It’s a great opportunity—even for those of us who do not fish for a living—to...
In this episode of the Podcast of Life , students from Martha's Vineyard Regional High School in Massachusetts and La Salle Academy in Rhode Island question shark researcher Greg Skomal about a...
Two fossilized teeth from a megalodon ( Carcharodon megalodon ) dating back more than 20 million years. Their teeth can reach a diagonal length of seven inches! The ancestry of great white sharks has...
Sharks come in all sizes. The largest is the whale shark , which has been known to get as large as 18 meters (60 feet). The smallest fits in your hand. And the great white shark is somewhere in the...
This photo of a freshly cut dorsal fin from a scalloped hammerhead shark ( Sphyrna lewini ) , was taken in 2006 on a long-lined fishing boat in Cocos Island, 300 miles off the Pacific coast of Costa...
Starting this Sunday, August 1st, the fins will be circling on a television near you. Sunday kicks off The Discovery Channel’s “Shark Week,” an annual TV ritual that offers hours of programming about...
For many years, shark fin soup has been a popular delicacy at weddings and formal occasions in China. Recently, it has become clear that shark-fin removal is cruel to sharks and severely damages...
As far back as I can remember, I have always been fascinated by sharks. My father introduced me to the ocean through books, documentaries and diving, and whenever we would see sharks on a dive in the...
Guitarfish, rays, and other bycatch are tossed from a shrimp boat in La Paz, Mexico in 2006. Many species caught as bycatch are never monitored, and, insofar as they have important roles in the...
Unlike the hammerhead, the oceanic white-tip shark ( Carcharhinus longimanus ) is aggressive towards humans. It has been noted as a danger toward those stranded at sea, and is very powerful during...
A shark nursery of blacktip reef sharks ( Carcharhinus melanopterus ) in a lagoon in the Pacific. Shark nurseries are found mainly in shallow water regions in which the shark pups can grow up while...
The sea's largest fish has been a mystery until recent decades. Thanks to electronic tags, researchers are uncovering some of the secrets of the whale shark ( Rhincodon typus Smith, 1828 ). One...
The shortfin mako shark ( Isurus oxyrinchus) is found offshore in tropical and warm temperate waters of all oceans, but has been known to travel to cooler waters at times. It is very strong and the...
For nearly 30 years, National Geographic photojournalist Brian Skerry has been swimming with and photographing sharks, including great whites, tigers, bulls, blacktips, and great hammerheads all...
Great white sharks ( Carcharodon carcharias ) are marvels of evolution, with highly-evolved senses keeping them among the ocean’s top predators. However, they are threatened with extinction and...
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