A large shark was filmed near the beach within hours after the fatal attack, Reuters reported.
The authorities used a personal watercraft and a helicopter to try to encourage the shark away from the beach.
Paul Wilcox, a member of the Byron Bay Swim Club, was swimming in the shallows on the eastern side of Byron Bay’s main beach when he was attacked on Tuesday.
A shark killed a 50-year-old swimmer Tuesday at eastern Australia’s popular Byron Bay despite a beachgoer’s brave rescue attempt, police said.
Beachgoer Mark Hickey swam 15 to 20 meters (50-65 feet) into the water at Clarkes Beach to retrieve the severely wounded victim, Police Inspector Bobbie Cullen said.
He said Wilcox had apparently bled to death in the water. Ten reported that the shark had bitten through Wilcox’s wetsuit on his upper right thigh, tearing off much of his leg. The wounds were being examined to identify the size and species of the shark.
The 80-year-old croc, named Brutus, is a legendary reptile in Australia. He weighs in at 2 tons and stretches 18 feet long.
The epic fight may have been a revenge attack, as the ferocious Brutus lost his right front foot — apparently in an earlier match with a shark.
It is believed the shark was attracted to the area by a six-metre whale seen earlier near City Beach, close to Perth.
One witness talked of seeing the shark swimming near the whale, with both heading north.
"First of all, I saw the whale, and then I could see something following it," the witness said.
"And then people were saying: ‘What’s pursuing it?’. And yeah, then it was clear, it was a shark."
The 16-feet-long female dubbed “Joan of Shark,” while estimated weighing 1.6 tons, is the largest shark to be electronically tagged in Australia, the Telegraph reported.
That electronic tag, detected by a satellite monitoring system, is what warned nearby residents to stay out of the water while a team of researchers, shockingly, went straight in.
The head and gills of the ”1.5m long juvenile shark” were tightly entangled in industrial strength elastic cord. The shark was “facing a slow and painful death, with the cord continually tightening as the young animal grew in size.” Although, they knew that the mission could be dangerous, the team was determined to carry out the intervention as quickly as possible.
New figures show that three quarters of the sharks caught by Western Australia’s shark baiting were undersize. All the more reason to halt the program, writes Elizabeth Claire Alberts - and to end similar programs elsewhere in Australia
It was a Jackass-style stunt that nearly turned around and bit Australian adrenalin junkie Shaun Harrington – or rather mauled him.
Harrington, 27, and fellow forever-clowning twin brother Dean decided to go “cage diving” with sharks off the Gold Coast, which is Australia’s answer to Miami, last weekend for an extreme video shoot for their surfing and fishing clothing label, fittingly called The Mad Hueys.
But the cage wasn’t the jaws-proof reinforced steel type typically used by shark divers – it was a flimsy $50 bird cage Shaun planned to put on his head.