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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...
What is scarier: sharks or extinction? This video from Save Our Seas puts...
Overview MORE STORIES Overview MORE AUDIO / VIDEO
Sharks are much older than dinosaurs. Their ancestry dates back more than 400...
Slideshow MORE STORIES Slideshow MORE AUDIO / VIDEO
Long before great white sharks appeared, much larger ancestors roamed the ocean...

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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 fastest known species of shark...
This photo of a freshly cut dorsal fin from a scalloped hammerhead shark (...
The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller...

DIVE DEEPER

There are more than 500 species of sharks swimming in the world’s ocean. Yet when most people think of these cartilaginous...
Large numbers of grey reef sharks ( Carcharhinus amblyrhynchos ) were observed at Jarvis Island, an uninhabited Pacific island, during the 2010 Pacific RAMP expedition of the NOAA Ship Hi'ialakai ...
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 ,...
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...
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...
Several Caribbean reef sharks swim over a coral reef in the Bahamas in this image captured by National Geographic photojournalist Brian Skerry. For nearly 30 years, Skerry has been swimming with and...
A scalloped hammerhead Sphyrna lewini at Isla del Coco, Costa Rica. Illegal shark fishing along with increasing demand for shark fin soup has led to the removal of 95% of endangered scalloped...
“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...
Sharks have a long and impressive lineage. Ancient sharks were cruising the ocean 400 million year ago- long before dinosaurs roamed on land. Relatives of the great white like the giant megatooth...
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...
Reef sharks rarely get any love. These sharks, comprising several species, loiter around coral reefs, snacking on small fish, squids and crustaceans. And while their size is nothing to smirk at—5-10...
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...
Is it an enormous eel? No—it's a shark! The frilled shark is named for its strange appearance , including a snakelike body, three pronged teeth, and gills that give the impression of a frilly collar...
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...
During the late Cretaceous period, Kansas was covered by a vast sea. There, scientists have found fossils of Squalicorax sharks (also called crow sharks) that lived 70-80 million years ago. They were...
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...
When we think "Africa," we think of the "Big Five"—lions, elephants, leopards, buffalo and rhinos—that crisscross the African Savannah. Few would imagine that there could be more natural beauty on...
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...
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...
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