Jason "Trapman" Moyce said the tail alone of the shark was 2m tall. Photos / Facebook Trapman Bermagui
A 4.5m Great White shark has been found dead in a net off Maroubra Beach, one of Sydney's most popular surf spots.
State authorities confirmed the shark was found dead in the nets after a fisherman posted images of it being removed. The beach was closed until about 11am.
"[The New South Wales Department of Primary Industries] can confirm a 4.65 metre White Shark was removed from the Maroubra shark meshing net this morning by contractors during a routine check," a spokesperson said.
"DPI shark scientists have completed a full necropsy on the White shark."
Adam Cree, from Blue Reef Fishing Charters, who saw the shark being removed, said it was "the biggest shark I've ever seen," the Daily Telegraph reports.
Referring to the controversy over shark nets – which critics say harm marine life without necessarily making beaches safer - he noted that he had not caught the shark and urged people not to "abuse" the officials who removed it.
"Just a heads up for those who are hurling abuse at me on my last post, I actually live [480km] away from Sydney and did not catch the shark," he wrote.
"I do know the guys who do this job and they work hard to keep our beaches safe - whether you agree with shark net protection or not, these guys are not the ones to abuse."
Following a spate of shark attacks and sightings in recent years, authorities have adopted a range of measures to improve safety, including aerial and drone surveillance and using special hooks which are connected to buoys and can tag sharks and allow them to be tracked. Nets have been used in NSW since the 1930s but regularly prompt debate over whether they should be removed or extended.
The Government said its beach nets do not create an enclosed area or provide a barrier between swimmers and sharks.
"They are designed to reduce the likelihood of shark interactions by catching large, potentially dangerous sharks aggregating near the netted beach," the Government's website said.
"Shark nets are fitted with 'whale alarms' and 'dolphin pingers' to deter marine mammals from the netted area."
According to Taronga Zoo's Australian Shark Attack File, 18 attacks have occurred in Australia this year. The only fatality occurred earlier this month in Queensland.
On Sunday, a 17-year-old underwent emergency surgery after being "mobbed" by sharks while spearfishing and diving in the Northern Territory.
Joseph Smith, a fellow diver, said he saw a "pool of blood" near their boat.
"He'd speared a mackerel and then they took the mackerel off his spear rod … then the sharks turned on him," he told ABC News.
"He said he saw about seven [sharks], but it was that quick that he didn't see the shark who bit him."
A 4.65m white shark has been removed from nets at Maroubra Beach this morning, the NSW Department of Primary Industries has confirmed. They say white sharks can grow to at least 6m in length.