Fishermen on a Norwegian cargo ship came into port in Freeport, Texas complaining of nausea, vomiting, diarrhea, and muscle weakness in October. The ill crew members were treated at a clinic; the Texas Department of Health began an investigation. Ciguatoxin poisoning was determined to be the cause of the illnesses. All ill crew members had eaten left-over barracuda. The fish was originally caught on October 11 near Cay Sal Bank in the Bahamas. Ciguatera poisoning can occur when fish containing high levels of a toxin made by the dinoflagellate, Gambierdiscus toxicus, are consumed.