shewanella gelidimarina shewanella gelidimarina shewanella gelidimarina is a species of bacteria, notable for being an antarctic species with the ability to produce eicosapentaenoic acid. it grows anaerobically by dissimilatory fe (iii) reduction. its cells are motile and rod shaped. acam 456 is its type strain. shewanella gelidimarina scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: shewanellaceae genus: shewanella species: shewanella gelidimarinabowman et al., 1997