Authorities say a 58-year-old Pennsylvania woman died after she was attacked by a bull shark while snorkeling in Nassau, Bahamas.
Scientists say that rising water temperatures due to climate change are allowing juvenile sharks to expand their territory.
Shark activity along the beaches of the U.S. Northeast has increased in recent years amid a rising seal population and conservation efforts, experts say.
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.
A family member reportedly jumped in the water and “beat the shark” until the girl was freed.
One local beach temporarily closed due to a sighting.
"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.
A shark attack off State Parks Beach in Morro Bay on Christmas Eve left a surfer dead, authorities said Friday.
The surfer said he believed he was bitten by a 6- to 8-foot-long great white shark, which sunk its teeth into his leg 10 times.
An extinction event about 19 million years ago decimated shark populations by up to 90%, researchers say.
The great white shark population off the California coastline is rising, per a study published in Biological Conservation.
According to Florida Fish and Wildlife, tiger sharks are second only to the great white shark in the number of bites on humans worldwide.
A Minnesota boy vacationing in Florida with his family survived a shark attack Sunday in Miami Beach.