shewanella arctica shewanella arctica shewanella arctica is a gram-negative and anaerobic bacterium from the genus of shewanella which has been isolated from sediment from the arctic. shewanella arctica scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: shewanellaceae genus: shewanella species: s. arctica binomial name shewanella arcticakim et al. 2012 type strain jcm 16723, kctc 23109, ir 12, ir 26