Party-goers dressed in swimwear could be seen throwing punches and hurling themselves at one another near “the stage”. The lake is about 48 miles north of Orlando.
The video released by the Volusia County Sheriff’s Office showed at least four or five men at the centre of the brawl, with many party-goers watching on.
The sheriff’s office told The Independent on Friday that one person was seriously injured as a result of the brawl, and had to be airlifted to hospital. He is due to bring charges.
Volusia County Sheriff Mike Chitwood told NBC Miami that law enforcement had trouble getting to the injured man.
“It took a while to get the medical attention to him. It took a while to get him to a landing zone where air one had to improvise to land which was a feat in itself. They landed on basically a postage stamp,” Mr Chitwood said.
Multiple law enforcement agencies were on patrol when the fighting broke out, and officers were reporting as saying that multiple arrests and citations were made.
It is unclear what led to the brawl, which the sheriff’s office said led to 108 warnings, 38 boating citations, and five arrests – three for boating under the influence and two for disorderly conduct.
“People are just out there to have a good time, but like anything else, when you have a huge concentration of people like this and you have alcohol involved, you do have some incidents,” Mr Chitwood said.
The Facebook page for the event suggests more than 2,500 people had registered to attend, and a 2023 date has already been announced.
The Independent has contacted the Volusia County Sheriff’s Office for comment.