psychrobacter maritimus psychrobacter maritimus psychrobacter maritimus is a gram-negative, aerobic oxidase- and catalase-positive, nonpigmented, non-spore-forming, nonmotile bacterium of the genus psychrobacter, which was isolated from coastal sea ice and sediments of the sea of japan and in russia. psychrobacter maritimus scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: psychrobacter species: p. maritimus binomial name psychrobacter maritimusromanenko et al. 2004 type strain cip 108811, dsm 15387, kmm 3646, pi2-20