A 12-year-old Australian boy died after a brutal shark attack in Sydney Harbor, his family confirmed Saturday. 

Nico Antic had been fighting for his life since Jan. 18, when he was attacked while swimming at a popular cliff-jumping spot known as Jump Rock near Shark Beach in the eastern Sydney suburb of Vaucluse. 

His family announced Saturday that he had died.

"We are heartbroken to share that our son, Nico, has passed away," Nico’s parents, Lorena and Juan, said in a statement. "Nico was a happy, friendly, and sporty young boy with the most kind and generous spirit. He was always full of life and that’s how we’ll remember him."

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They also thanked first responders and medical staff at Sydney Children’s Hospital in Randwick for their efforts and members of the community for their support.

A GoFundMe campaign launched by a family friend had raised more than $266,000 as of Saturday evening.

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According to police, the attack happened around 4:20 p.m. Jan. 18, after Antic jumped from a 20-foot ledge into the water. He sustained severe injuries to both legs, believed to have been caused by a large shark.

His three friends immediately jumped into the water, pulled him to shore and called for help. Antic was rushed to the hospital in critical condition. 

Local media reported at the time that he had lost both legs.

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The tragedy is among a surge of shark incidents across Australia. Dozens of beaches were closed this week after four shark attacks in mere days.

Australia averages roughly 20 shark attacks a year, with fewer than three proving fatal, according to Reuters.

Fox News Digital's Stephen Sorace contributed to this report.

A surfer in Australia escaped a shark attack with minor injuries on Tuesday, marking the fourth shark attack off the country’s most populous state in just three days.

The shark struck around 9 a.m. at Point Plomer, about 290 miles north of Sydney, damaging the 39-year-old man’s surfboard, officials said. The surfer suffered only minor cuts.

"The board seemed to take most of the impact," Matt Worrall, captain of the Kempsey–Crescent Head Surf Life Saving Club, told Australian Broadcasting Corp. "He made his own way into shore where he was assisted by locals."

Bystanders drove the surfer to a hospital, where he was treated and later released.

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The latest incident follows a string of attacks along the New South Wales coast. On Sunday and Monday, a man and a boy suffered critical leg injuries in separate attacks near Sydney, while another boy escaped unharmed after a shark bit his surfboard.

Authorities closed beaches along New South Wales’ northern coast and in northern Sydney, saying the closures would remain in place for at least 48 hours. Electronic drumlines designed to alert officials to the presence of large sharks were deployed offshore.

"If anyone's thinking of heading into the surf this morning anywhere along the northern beaches, think again. We have such poor water quality that’s really conducive to some bull shark activity," Surf Life Saving NSW chief executive Steve Pearce said.

"If you're thinking about going for a swim, just go to a local pool because at this stage, we’re advising that beaches are unsafe," Peace added.

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Authorities believe bull sharks are likely responsible for several of the attacks around Sydney, noting that recent heavy rainfall has increased murky freshwater runoff into Sydney Harbor.

One of the most serious attacks happened Sunday when a 12-year-old boy was attacked after jumping from a 20-foot ledge known as Jump Rock near Shark Beach in eastern Sydney. Police said the boy survived only because friends leaped into the water and pulled him to shore. Local media reported he lost both legs.

"He is in for the fight of his life now, and the actions of emergency services yesterday gave him that chance," said Superintendent Joseph McNulty of the New South Wales Police Marine Area Command.

An 11-year-old boy escaped unharmed Monday after a shark bit his surfboard at Dee Why Beach, and later that evening a surfer in his 20s was bitten on the leg at North Steyne Beach and hospitalized in critical condition.

Sydney’s northern beaches, including Dee Why and North Steyne, remained closed. Officials said it was unclear whether the attacks occurred near shark netting. Pearce said the Point Plomer area is isolated and does not have nets.

Dee Why Beach is near the site where a 57-year-old surfer was killed by a suspected great white shark last September. In November, a 25-year-old Swiss tourist was killed and her partner seriously injured in a separate attack north of Sydney.

The Associated Press contributed to this report.

A 12-year-old Australian boy was fighting for his life after suffering catastrophic injuries in a shark attack in Sydney Harbor, surviving only because his friends leaped from a cliff and dragged him back to shore, authorities said.

The attack happened around 4:20 p.m. Sunday after the boy jumped from a 20-foot ledge known as Jump Rock near Shark Beach in the eastern Sydney suburb of Vaucluse, police said in a statement. Police said the boy suffered severe injuries to both legs from what is believed to have been "a large shark."

His three friends immediately jumped into the water and pulled him to shore, actions authorities said likely saved his life.

"The actions of his mates who have gone into the water to pull him out have been nothing but brave," said Superintendent Joseph McNulty of the New South Wales Police Marine Area Command, calling the injuries "very confronting" for the young rescuers to witness.

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Local media reports said the boy lost both legs in the attack.

"He is in for the fight of his life now, and the actions of emergency services yesterday gave him that chance," McNulty said.

The attack was one of three shark encounters reported in the Sydney area in just over 24 hours.

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On Monday evening, a surfer in his 20s was bitten on the leg by a shark off North Steyne Beach in the northern suburb of Manly. Bystanders pulled him from the water before he was taken to a hospital in critical condition, police said.

Earlier Monday, an 11-year-old boy escaped unharmed after a shark bit into his surfboard at Dee Why Beach, also north of Manly.

Authorities believe bull sharks may be responsible for at least the first two attacks. Police said recent heavy rainfall had increased murky freshwater runoff into Sydney Harbor, conditions known to heighten bull shark activity.

Sydney’s northern beaches, including North Steyne and Dee Why, remained closed as a precaution. All three locations have shark netting, though officials said it was not immediately clear whether the attacks occurred near those barriers.

The Associated Press contributed to this report.