Vibrio vulnificus is a form of bacteria that can make people ill, as when eating bad clams or oysters, and more in people with a liver disease. "Vibrio vulnificus" is a species of Gram-negative, motile, curved rod-shaped (bacillus), pathogenic bacteria of the genus "Vibrio". Present in marine environments such as estuaries, brackish ponds, or coastal areas, "V. vulnificus" is related to 'V. cholerae', as a bacteria which can give people cholera.