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.

Kayakers' shark encounter at Half Moon Bay caught on video

An Oakland man had a close encounter with a shark while kayak fishing in Half Moon Bay. Ian Walters said it happened last week while he and a friend were fishing for halibut and link cod. He shared with KTVU video he shot of the encounter.

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.

Search for swimmer called off, shark attack still unconfirmed

We still don't know the fate or identity of a swimmer who went missing Sunday morning. His two swimming partners say they saw him attacked by a shark.

Sharks goalie James Reimer declines to wear Pride jersey

San Jose Sharks goalie James Reimer didn't take part in pregame warmups Saturday night, saying the team’s decision to wear Pride-themed jerseys in support of the LGBTQ community runs counter to his religious beliefs.

2 shark attacks in a week off Long Island amplifies safety concerns

Beaches on Long Island, in New York, are on heightened alert after officials say a shark bit a lifeguard who was playing a shark bite victim in a training drill.

Shark attack survivor released from hospital

A Central Coast man who was attacked by a great white shark has been released from the hospital. 

Northern California shark attack victim expected to recover

A swimmer who was attacked by a shark Wednesday about one mile west of the Monterey Bay Aquarium says he was bitten so badly he was concerned he might bleed to death, and owes his life to good Samaritans who rushed to his rescue.

Shark attack in Monterey County leaves man hospitalized

One person was hospitalized with unknown injuries after a shark attack in Monterey County on Wednesday.

Sharks swimming closer to crowded beaches than previously thought, study says

"We were surprised to find that the sharks we tracked spent so much time near the lights and sounds of the busy city, often close to shore, no matter the time of day," the study author said.