colwellia asteriadis colwellia asteriadis colwellia asteriadis is a gram-negative and rod-shaped bacterium from the genus of colwellia which has been isolated from the starfish asterias amurensis from the sea of japan. colwellia asteriadis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: colwelliaceae genus: colwellia species: c. asteriadis binomial name colwellia asteriadischoi et al. 2010 type strain kmd002, jcm 15608, kccm 90077 synonyms colwellia amurensis