3 shark attacks off Sydney in just over 24 hours; man, boy in critical condition

Three shark attacks in 24 hours leave a man and a 12-year-old critically injured and another boy unharmed at Sydney beaches. Here’s what we know.

Man dies in shark attack at Sydney beach

A man in his 50s was killed by a large shark while surfing at a beach near Sydney, Australia on Saturday.

VIDEO: Florida shark, stingray get into tussle off the coast of Panama City Beach

WATCH: A shark and stingray engaged in quite the tussle last month off the shore of Panama Beach in Florida. A woman was able to capture the moment on camera.

Largest shark ever tagged by research group spotted off Florida coast

Researchers are tracking what may be the largest male white shark ever tagged by OCEARCH, with recent signals coming from off Florida's east coast near Jacksonville.

Scuba divers have 'once-in-a-lifetime' close encounter with great white shark near Catalina

Scuba divers near Catalina had a rare and thrilling encounter with a 15-foot Great White Shark, capturing the moment on video as the shark calmly circled them before swimming away.

Shark washes ashore at NYC beach, rescued by beachgoers

Video captured by a beachgoer shows the thresher shark stranded in the sand at Rockaway Beach, fighting to get back in.

Shark attack off Hawaii's Oahu island leaves woman seriously hurt

Also Friday, reported back-to-back shark attacks led authorities to temporarily close beaches to swimmers in Walton County, on the Florida Panhandle.

Video shows large shark swimming eerily close to people at Florida beach: 'That sucker came close!'

Swimmers at Navarre Beach in Florida got quite a surprise over the Fouth of July weekend when a large shark was swimming in the ocean alongside them. Video shows people quickly getting out of the water.

Shark bites leg off American tourist in Turks and Caicos: report

An American tourist has lost her leg after being bitten by a shark while vacationing in Turks and Caicos, police say.

Photos reveal sharks circling unsuspecting beach-goers at Myrtle Beach
video

A woman vacationing in Myrtle Beach, South Carolina, snapped some startling photos from her 15th floor hotel room of several sharks swimming in shallow water near unaware beach-goers below.