Katarina Zarutskie, a Miami nursing student with nearly 28,000 followers, was among a school of nurse sharks in the Bahamas when one bit her wrist.

Dozens of shark sightings have been reported on both coasts, with 11 great white sharks spotted off Cape Cod and three in San Diego.

The girl was swimming when she was bit by something.

A young girl was apparently bitten on the leg in Myrtle Beach, where witnesses reported seeing what looked like a fin in the water.

Australia's 9News reported that Jason Longrass, 41, and Alejandro Travaglini, 37, were attacked in two separate incidents less than a mile from each other on Monday in Gracetown.

Sarah Carroll swam with sharks twice on her honeymoon in the Caribbean.

Rescuers from Monterey County applied a tourniquet to stanch the blood loss.

“I saw a shark’s head come out of the water. . . I just punched it in the face."

Swimmers were in the water when a shark attacked a seal on Monday.

Massachusetts officials are considering a proposal to protect the state's beaches from sharks after a shark bit into a paddle board off the coast of Wellfleet and, in a separate incident, a shark attacked a seal off the coast of Nauset Beach.

Aerial video captured several sharks swimming through hundreds of fish.

Leeanne Ericson was attacked by a 10-foot great white shark and bitten in her right thigh and backside down to the bone.

Leeanne Ericson told ABC News she initially felt like she was in a cartoon when she was attacked by a 10-foot great white shark off the coast of San Diego earlier this year.

Shark expert Craig O'Connell discusses if there are potential dangers involving great white sharks for people swimming in the New York City area.

Rob Lowe was seen paddleboarding near great white sharks in Malibu, California.

Lifeguards saw the shark lurking in the water and urged beachgoers to exit the water, but one man was bitten in the legs and sustained non-life-threatening gashes.

Beachgoers are advised to be alert during the holiday weekend and to follow precautions by staying close to shore and never swimming alone.

Experts say a growing seal population is to blame for the increased numbers of great white sharks.

Senior Fisheries Biologist Dr. Greg Skomal tells "GMA" why experts are predicting an increase in great white sharks off the coast of Cape Cod and what beachgoers can do to minimize their risk.

Tiffany Johnson was snorkeling in a shallow reef in the Bahamas when she was attacked by a shark.

The kayaker didn't splash and kept his eyes on the shark while swimming away, keeping safe long enough for the Coast Guard to arrive.

Scientists believe the sharks did not migrate to Mexico as usual due to higher than normal ocean temperatures.

Fisherman stuck in raging waters; New Orleans champagne vending machine.

A pair of shark sightings forced the brief evacuation of a part of Fort Lauderdale Beach on Friday.

Caitlyn Taylor, 17, from Louisville, Kentucky, sustained six puncture wounds from the shark bite but was able to fend off the shark, the Okaloosa County Sheriff's Office said in a statement.

A shark estimated to be 5 feet long attacked the teen.

Visitors to Brighton Beach were shocked to see a small shark close to the shore.

After the hook was removed, the shark swam away.

Here's what you can do when sharks have you in their sight.

Johnny Stoch required surgery to reconstruct his calf muscle.

Her friends have since buried the 2-foot nurse shark.