hymenobacter aquaticus hymenobacter aquaticus hymenobacter arcticus is a gram-negative, aerobic, rod-shaped, non-spore-forming and non-motile bacterium from the genus of hymenobacter which has been isolated from the han river in korea. hymenobacter aquaticus scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: hymenobacteraceae genus: hymenobacter species: h. aquaticus binomial name hymenobacter aquaticuslee et al. 2017 type strain jcm 31653, kctc 52194, strain 16f3p