colwellia aestuarii colwellia aestuarii colwellia aestuarii is a gram-negative and motile bacterium from the genus of colwellia which has been isolated from tidal flat sediments from korea. colwellia aestuarii scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: colwelliaceae genus: colwellia species: c. aestuarii binomial name colwellia aestuariijung et al. 2006 type strain dsm 17314, kctc 12480, smk-10