Cameron Grace, 17, saw the fish getting close to the swimmers in Forster, New South Wales, Australia.
Birighitti went missing on January 2, 2020 after his body was swept to sea. A body discovered this week has been identified as the 21-year-old college soccer player.
Killer whales had been hunting great whites in the bay and eating their livers.
The great white shark is a protected species in New Zealand and hunting, killing or harming one is punishable with a fine of up to 250,000 New Zealand dollars and six months in prison.
The group on a charter boat off Broward took an hour to reel in the 13-foot fish before releasing it.
Jesse Gibson said he and his friend James Powley were fishing off the coast of Yallingup in Western Australia when they came across the floating carcass of a sperm whale.
Rescue personnel were deployed from the National Sea Rescue Institute Plettenberg Bay station after an eyewitness report of a shark targeting a person at Natures Valley.
The video was shared by Arturo Islas Allende, who claims the company involved had not complied with safety regulations.
For the second time in two years the species of shark got close to Massachusetts shark expert Greg Skomal.
Trackers went "crazy" over the weekend, says OCEARCH, a marine conservation nonprofit, as great white sharks migrated from Canada to the Gulf of Mexico for the winter.
Researchers have designed a material that blends ultra-high molecular weight polyethylene fibres (UHMWPE) onto neoprene, providing the possibility of light-weight shark-proof wetsuits.
In theory, the ancient shark could have grown up to a staggering 22 feet in length, according to researchers.
Orcas were dubbed killer whales after ancient sightings of them ganging up against other (frequently larger) whale species. More recently, they have also been known to attack and kill great white sharks.
Data from OCEARCH has shown that the Atlantic continental shelf waters off the coasts of North Carolina, South Carolina, Georgia and Florida are a winter "hot spot" for white sharks.
"You can see what looks like teeth marks and I just can't think of anything else that could have done this," a witness told British tabloid media. But experts say white sharks are not known in the region.
Wildlife photographer Euan Rannachan spoke to Newsweek about his underwater adventures with the apex predators.
The shark was tagged in September by researchers from non-profit OCEARCH near Nova Scotia in Canada,
The diver was hit by "a major adrenaline rush" as she encountered the huge creature.
Shark was likely attacked during "very violent" attempt at mating.
"I was about 75 per cent sure I wasn't going to make it back to the boat," the fisherman said.
"The most epic thing I've ever witnessed on the water," said commercial fisherman Matt Riley on Instagram alongside two videos showing the large shark swimming close to his boat on August 28.
"It was by far the most horrifying moment of my entire life," survivor Deborah Scaling-Kiley said, recalling seeing her friend killed.
A fellow passenger captured the incredible moment the shark leaped at their boat.
The 20-foot-long shark featured in National Geographic's film 'World's Biggest Great White?'
Police are investigating the legs, but aren't yet sure if any laws have been broken.
"That's an immense amount of power you need to take a bite out of another shark like that," a shark expert commented.
The migratory patterns of these sharks are not well understood.
"When confronted by orcas, white sharks will immediately vacate their preferred hunting ground and will not return for up to a year."
"It all happened quickly, but I turned and saw that it had one of my legs in its mouth."