This goes beyond Florida, see below. If you are in warm seawater, seems like something to be both aware of and concerned about. Particularly if you go in with cuts, open wounds duct taped over, etc.. It seems to infect through cuts, open wounds and through consumption of raw/under cooked seafood like oysters. "State health officials say at least nine people have died so far this year in Florida " "CDC received reports of more than 900 V. vulnificus infections from the Gulf Coast states, where most cases occur."
"What type of illness does V. vulnificus cause?
V. vulnificus can cause disease in those who eat contaminated seafood or have an open wound that is exposed to seawater. Among healthy people, ingestion of V. vulnificus can cause vomiting, diarrhea, and abdominal pain. In immunocompromised persons, particularly those with chronic liver disease, V. vulnificus can infect the bloodstream, causing a severe and life-threatening illness characterized by fever and chills, decreased blood pressure (septic shock), and blistering skin lesions. V. vulnificus bloodstream infections are fatal about 50% of the time.
V. vulnificus can cause an infection of the skin when open wounds are exposed to warm seawater; these infections may lead to skin breakdown and ulceration. Persons who are immunocompromised are at higher risk for invasion of the organism into the bloodstream and potentially fatal complications."http://www.cdc.gov/nczved/divisions/dfbmd/diseases/vibriov/#top