Allegations of cheating lead to a massive fight involving several passengers on the Carnival Magic cruise ship, according to an eyewitness who published a video of the fight to Fox News Digital.
Accusations of a threesome among guests sparked conflict after one passenger's partner found out, said the witness, Theresa James.
James, a travel agent, claimed she saw the fight break out near the ship's dance club on the fifth floor at around 2 am on Tuesday 28 June.
The incident escalated and smashed beer bottles may have resulted in a woman being cut, James said.
Although it lasted about an hour and an estimated 60 people were involved, the travel agent said it was not physical the entire time.