The man ate the bad oyster at a Sarasota restaurant two days before succumbing to gastrointestinal illness.
Authorities have so far refused to reveal the man's identity and the name of the restaurant.
Health officials say you should not go into the water if you have fresh cuts or scrapes.
Vibrio is a strain of bacteria found in oysters and other seafood.
This Canadian Woman Is Meghan Markle's "Secret" Stylist
Apparently, that put the royal family in their silence mode...so, I gave yet another interview to break that silence. I'd find a hotel room and try to reach them.
The vast majority of vibriosis infections result in symptoms typical of a foodborne illness: cramping, diarrhea, vomiting, nausea, fever, and chills.
WWSB also warns that bacteria can enter the system through an open wound, so be wary swimming with cuts.
The illness was caused by Vibrio vulnificus, officials said.
This is the first confirmed case and death from Vibrio vulnificus in Sarasota County this year.
Oysters, clams, and mussels need to be cooked thoroughly since infection may be contracted through consumption of undercooked shellfish.
"Exposures occur more commonly during the summer months from May to October, when the water is warmer", agency officials told the Tampa Bay Times. Individuals who exhibit symptoms after entering the water with open wounds or after eating raw shellfish are urged to see their doctor. "That's usually not the case when someone consumes the bacteria", Drennon said. In 2016, Manatee County had two cases, while Sarasota County had three cases and one fatality.