vibrio diabolicus vibrio diabolicus vibrio diabolicus is a polysaccharide-secreting bacterium isolated from a deep-sea hydrothermal vent polychaete annelid, alvinella pompejana. it is facultatively anaerobic, heterotrophic, and mesophilic. vibrio diabolicus scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: vibrionales family: vibrionaceae genus: vibrio species: v. diabolicus binomial name vibrio diabolicusraguénès et al. 1997