psychrobacter nivimaris psychrobacter nivimaris psychrobacter nivimaris is a gram-negative, oxidase- and catalase-positive, aerobic, nonmotile bacterium of the genus psychrobacter, which was isolated from the southern ocean. psychrobacter nivimaris scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: psychrobacter species: p. nivimaris binomial name psychrobacter nivimarisheuchert et al. 2004 type strain 88/2-7, cip 108514, dsm 16093, ncimb 13982