hwangdonia hwangdonia hwangdonia is a gram-negative, rod-shaped, aerobic and non-motile genus of bacteria from the family of flavobacteriaceae with one known species (hwangdonia seohaensis). hwangdonia seohaensis has been isolated from sediments of tidal flat from hwangdo in the yellow sea. hwangdonia scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: hwangdoniajung et al. 2013 type species hwangdonia seohaensis species h. seohaensis