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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 greatest success stories. These animals are uniquely adapted to their ocean environment with...
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...

LATEST POSTS

An X-ray image of a Monterey skate ( Raja montereyensis ) reveals a spine that extends like a tail out from the pelvic fin. The skeletons of skates, rays, chimaeras, and sharks are made of cartilage, rather than bone. Scientists...
"Tens of millions of sharks are killed each year, often only for their fins...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller...

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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...

The Ocean Blog

An oceanic whitetip shark swims near a biologist in the Bahamas in this image captured by National Geographic photojournalist Brian Skerry. For nearly 30 years, Skerry has been swimming with and...
Omoo, a Great White Shark ( Carcharodon carcharias ), carries a satellite tag that sends information daily about her movements across the Pacific. Follow her migration real-time . More about the...
Grey reef sharks ( Carcharhinus amblyrhynchos ) are among the most versatile and tough predators on a Pacific coral reef, but they are also among the most vulnerable species, as they are threatened...
Great white sharks are athletic hunters, leaping completely out of the water as they attack prey from below. They have six highly refined senses : smell, hearing, touch, taste, sight, and...
Whenever a shark attacks a human, it's headline news. But when a human kills a shark, it goes unreported. Fear keeps many people from caring about sharks. But sharks have more reason to fear us than...
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...
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...
Scientists in the Division of Fishes at the Smithsonian's National Museum of Natural History use X-ray imaging to study the complex bone structure and diversity of fish. This image gallery showcases...
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...
Tom Peschak, a photojournalist with the Save Our Seas Foundation, describes the devastating effects shark nets have on ocean life along the South African coastline. The nets were installed to protect...
Scientists know the Greenland shark ( Somniosus microcephalus ) moves slowly in the Arctic's cold water. They also know that parasites attack the shark's eyes. But much about this animal remains 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...
Who should fear whom? Less than ten humans are killed by shark attacks. Yet millions of sharks are killed each year by humans. More about the great white shark can be found in our 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 .
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...
I want snack, so give me cookie! The cookie cutter shark ( Isistius brasiliensis ) is as fearless as they come! This small, 20-inch shark can take on giants like whales and larger sharks, and have...
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...
From a distance, Henry the Fish looks like a typical quirky and colorful sculpture you'd find in a small beach town. But when you look up close, Henry begins to change. His bright yellow and red...
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