psychrobacter pacificensis psychrobacter pacificensis psychrobacter pacificensis is a gram-negative, aerobic, non-spore-forming, catalase- and oxidase-positive, psychrophilic, nonmotile bacterium of the genus psychrobacter, which was isolated from 6000-m-deep seawater of the japan trench on the hachijo island in japan. psychrobacter pacificensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: psychrobacter species: p. pacificensis binomial name psychrobacter pacificensismaruyama et al. 2000 type strain ifo 16270, nbrc 103191, nibh p2k6