ulvibacter antarcticus ulvibacter antarcticus ulvibacter antarcticus is a gram-negative, obligately aerobic and chemoheterotrophic bacterium from the genus of ulvibacter which has been isolated from antarctic seawater from the coast. ulvibacter antarcticus scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: ulvibacter species: u. antarcticus binomial name ulvibacter antarcticuschoi et al. 2007 type strain imcc3101