halovibrio variabilis halovibrio variabilis halovibrio variabilis is a gram-negative, aerobic, mesophilic and heterotrophic bacterium from the genus of halovibrio. halovibrio variabilis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: oceanospirillales family: halomonadaceae genus: halovibrio species: h. variabilis binomial name halovibrio variabilisfendrich 1989 synonyms halomonas variabilis