shewanella algicola shewanella algicola shewanella algicola is a gram-negative, rod-shaped, aerobic and motile bacterium from the genus of shewanella with a single polar flagella which has been isolated from the alga sargassum thunbergii from the coast of jeju island on korea. shewanella algicola scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: shewanellaceae genus: shewanella species: s. algicola binomial name shewanella algicolakim et al. 2016 type strain jcm 31091, kctc 23253, st6