This is the terrifying moment a man was dragged overboard after a shark chomped onto his hand during "one of the scariest days on the water".
The fisherman, who is only known as Nick, was on a boat at Everglades National Park in Florida, US, when he was seen reaching over the water to wash his hands before a shark jumped up and pulled him off the boat.
Nick was desperately trying to get back on the boat as his shocked friends screamed and shouted "get him, get him".
Blood was seen splatted on the side of the boat before the man eventually made it back on the vessel.
Nick was lifted to a nearby hospital by Miami-Dade Fire Rescue after park rangers initially leapt to the scene, according to local reports.
Wildlife officials are sharing the footage to urge caution when going fishing in Florida waters.
One local fishing guide wrote: "PSA: please don't make the same mistake and please keep your hands and feet in the vessel."
The video was sent to local media by one of the passengers onboard Michael Russo, who admitted the experience was "one of the scariest days on the water".
In a since-deleted post, Mr Russo explained how his friend was dragged overboard in the frightening footage.
He wrote: "Today was one of the scariest days on the water I have ever had.
"It started off great and we were crushing the fish but the sharks were eating some, despite our best efforts. After releasing a snook, Nick washed his hands in the water and was immediately bit by a large [lemon] shark.
"The sharks are no joke in the Everglades and the warnings about keeping your hands out of the water are not an exaggeration."
He labelled the attack "unprovoked" and claimed there was no blood or chum in the water when the shark went to attack Nick, who was trying to wash his hands.
Nick, who is seen wearing a white hoodie, appears to drop a fish back in the water before cleaning his hands in the dirty water.
However, when he leans down the second time, the grey shark jumps out of the water and grabs the man's hand before being pulled into the water.
It is unclear what injuries Nick suffered in the attack.
Moreover, Nick was rushed to the Jackson South Medical Centre via helicopter where is being treated with "the best care possible", according to Mr Russo.
The viral video has led to other captains to warn of the dangers of sharks in Florida waters.
Captain Mike Venezia said: "I could show you a dozen places where there are packs of these lemon sharks lurking below. We can't fish in those areas anymore because it's so bad. Anywhere from the size of the one in this video to 250lbs plus.
"All it takes is 'two seconds' and a lapse of judgement to find yourself in a dangerous situation."
