Authorities believe aggressive bull sharks follow fish into shallow waters after storms, increasing the risk to swimmers and surfers.

A surfer was attacked one day after a large shark bit a 12-year-old boy in the legs, leaving him fighting for survival in a hospital.

A man in his 20s was critically injured in a shark attack at Sydney's North Steyne Beach on Monday, Jan. 19, the New South Wales Police said in a statement.

Four people have been attacked by sharks in New South Wales in a 48-hour period, including three incidents at Sydney beaches. Any shark bite incident is traumatic and Sydney swimmers have been warned to stay out of the water. So what are the details and why have there been so many bites in a short period of time?

The predator bit the boy, believed to be about 13 years old, during the late afternoon off Shark Beach, police said.

Authorities are warning people to stay out of the Australian state's waterways after recent rainfall.

Four people have now been bitten by sharks in the last two days in New South Wales, including three in Sydney Harbor. Two people are in critical condition.

The Australian Dream, to own one’s own quarter-acre block complete with picturebook home, verdant garden and Hills Hoist rotary

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