psychrobacter aestuarii psychrobacter aestuarii psychrobacter aestuarii is a gram-negative, strictly aerobic, non-spore-forming, nonmotile bacterium of the genus psychrobacter which was isolated from tidal flat sediment in the south sea in korea. psychrobacter aestuarii scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: moraxellaceae genus: psychrobacter species: p. aestuarii binomial name psychrobacter aestuariibaik et al. 2010 type strain jcm 16343, kctc 22503, sc35