Host Bertie Gregory filming a ragged tooth shark underwater. "Sharks Up Close With Bertie Gregory" premieres on National Geographic on July 5. Photograph By Dan Beecham, National Geographic Slashing ...

AS A MARINE enthusiast, I am thrilled to share my knowledge about encountering ragged-tooth sharks, also known as sand tiger or grey nurse sharks, in South Africa. These fascinating creatures can be ...

A lot more shark sightings are coming in with more people on the water, including a great white shark chomping on a caught striped bass, and a seal with a shark bite being spotted off the Boston ...