arenibacter antarcticus arenibacter antarcticus arenibacter antarcticus is a gram-negative, strictly aerobic and rod-shaped bacterium from the genus of arenibacter which has been isolated from sediments the ross sea. arenibacter antarcticus scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: arenibacter species: a. antarcticus binomial name arenibacter antarcticusli et al. 2017 type strain gdmcc 1.1159, kctc 52924, r18h21