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What is scarier: sharks or extinction? This video from Save Our Seas puts whether we should fear sharks or they should fear us into perspective . Humans have killed killed off 95% of some...
Dr. Mahmood Shivji explains how shark DNA is used as evidence to prosecute...
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Sharks are one of nature’s most beautiful—and misunderstood—creatures. When...
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Long before great white sharks appeared, much larger ancestors roamed the ocean...

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At night this lemon shark ( Negaprion brevirostris ) lurks at the surface, but often during the day they will lie on the ocean bottom. This behavior had been thought to save them energy, but in reality it takes energy for the...
The distinctive form of a winghead shark ( Eusphyra blochii ) is revealed by...
Sharks have young in three different ways. After internal fertilization,...

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Sharks are much older than dinosaurs. Their ancestry dates back more than 400 million years, and they are one of evolution’s...

The Ocean Blog

The International Union for the Conservation of Nature ( IUCN ) maintains the Red List of Threatened Species , an inventory of the global conservation status of plants and animals. In a 2010 study ,...
Imagine an adult person – now triple that size. That’s the size of the great white shark ( Carcharodon carcharias ). The biggest great white sharks can reach up to 20 feet long, but most are smaller...
Christian McDonald, the Scientific Diving Safety Officer at the Scripps Institution of Oceanography, tows a surface float at Millennium Atoll in the South Pacific.
By-catch, illegal fishing, sport fishing, loss of prey and habitat and shark nets are threatening Great White Shark ( Carcharodon carcharias ) populations globally. More about the great white shark...
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow . Learn more about the great white...
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...
An array of teeth from the sand tiger shark Carcharias taurus . The Smithsonian has the largest collection of shark teeth in the world, with more than 90,000 fossil shark teeth. More about sharks and...
A thresher shark’s long tail fin helps not only its swimming ability, but also its ability to hunt. It can use the fin to herd and trap schooling fish by swimming in increasingly smaller circles...
A life-sized model suspended over visitors at the San Diego Natural History Museum shows what an ancient shark, the Giant Megatooth ( Carcharodon megalodon ), might have looked like. More about the...
Dr. Mahmood Shivji of the Guy Harvey Research Institute and Save Our Seas Shark Center sampling a confiscated shark fin for DNA analysis. He can determine the species for hundreds of shark fins using...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller than a human hand. It's rarely seen and little is known about it, having only been observed a few times off the northern tip...
The goblin shark ( Mistukurina owstoni ) is one of the creepier fish out there! It has a long, prominent snout covered with special sensing organs (ampullae of Lorenzini) that help it to sense...
The fossil tooth whorl of the ancient shark Helicoprion , dating back 290 million years before present. For a long time, people didn't know what the shark looked like—but, thanks to a CT scan of a...
Great White Sharks breach to hunt -- with split-second timing they grab an unsuspecting seal or sea lion in one swift snatch. Follow the action in this slideshow of a breaching sequence .
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...
“Once in a while, manta rays appear in great numbers in a small bay in the Baa Atoll. The concentration of plankton must be very high in this particular bay, because up to 200 manta rays have been...
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...
Perhaps the most distinctive marine animal of all—the Great Hammerhead has a unique hammer-shaped head that gives it large visual range. Like other sharks, the hammerhead has many teeth. More so than...
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