Sharks

Shark DNA Helps Catch Poachers

Dr. Mahmood Shivji explains how shark DNA is used as evidence to prosecute shark fin poachers . What is shark finning? Find out here .

Visit the Line Islands with Reef Ecologist Dr. Stuart Sandin

A number of questions have inspired marine ecologist Stuart Sandin to head to the coral reefs of the Line Islands . Sandin works at the Scripps Institution of Oceanography at the University of California,...
Photograph of the model of a Giant Megatooth Shark, taken from the front..

Shark Ancestors

Long before great white sharks appeared, much larger ancestors roamed the ocean. This giant ancient shark -- the Giant Megatooth ( Carcharodon megalodon ) -- was probably big enough to eat a whale.

Rethink the Shark

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 evolved more...

Are Sharks Scary?

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 shark...

Protecting Sharks: How Nets Hurt

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 swimmers, but the...
Great White Sharks breach to hunt -- with split-second timing they grab their prey in one swift snatch. Follow the whole breaching action in this slideshow.

Great White Shark

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...
great white shark swims through the ocean

Great White Shark: One Species at a Time

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 charismatic predator...

Shark Fin Genetics

Dr. Demian Chapman of the Institute for Ocean Conservation Science at New York’s Stony Brook University explains how DNA extraction from shark fins can identify the species of shark and where the shark was...
The dwarf lantern shark sits in a human hand.

5 Reasons to Revere, Not Fear, the Shark

Photo Credit: NOAA A healthy coral reef has an abundance of small sharks that help keep the ecosystem in balance. But once people move into the area, they disappear —from fishing, loss of food...
An oceanic whitetip shark swims near a biologist in the Bahamas.

Image Gallery: Swimming with Sharks

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 around the world. In his first blog post...
Caribbean reef sharks swim over a coral reef in the Bahamas.

Swimming With Sharks

Lying in water only a foot deep, I watched the shark meander lazily through the mangrove, already exuding the confidence inherent of the supreme creature within its domain. It was hot here in Bimini,...

Reef Sharks Repelled by People

Large numbers of grey reef sharks were observed at Jarvis Island, an uninhabited Pacific island, during the 2010 Pacific RAMP expedition of the NOAA Ship Hi'ialakai . Credit: NOAA Reef sharks rarely get any...
A whale shark swims with a diver off the coast of East Africa.

The Big Five of the Ocean: Exploring the Waters of East Africa

A whale shark swims with a diver off the coast of East Africa. Credit: Caine Delacy When we think "Africa," we think of the "Big Five"—lions, elephants, leopards, buffalo and rhinos—that crisscross the African...

Field Notes from the East African Coast

Traditional fishing techniques now involve monofilament nets, with snorkelers diving down to ensure the bigger fish don't get away. Credit: Caine Delacy We began this journey three months ago, a team of scientists and...
Freshly cut dorsal fin from a scalloped hammerhead shark held by fisherman with knife.

Shark Finning: Sharks Turned Prey

A fisherman holds a freshly cut dorsal fin from a scalloped hammerhead shark (Sphyrna lewini). Every year, humans kill an estimated 100 million sharks. Removing sharks in large numbers can have ripple effects that...

Underwater Photography Contest from University of Miami’s Rosenstiel School

Every year the University of Miami's Rosenstiel School of Marine and Atmospheric Science hosts an underwater photography contest for amateur photographers. From playful marine mammals to hard-to-see invertebrates, these photos capture beautiful underwater scenes...
Brian Skerry sits on a 20 foot high underwater tripod to photograph the Aquarius Habitat off Florida.

Portraits of Planet Ocean – Behind The Photographs

Brian Skerry sits on a 20 foot high underwater tripod to photograph the Aquarius Habitat off Florida. Credit: Copyright © Mark Conlin As an assignment photographer, I sometimes feel as though I am living...