hoppeia hoppeia hoppeia is a gram-negative, rod-shaped and strictly aerobic genus of bacteria from the family of flavobacteriaceae with one known species (hoppeia youngheungensis). hoppeia scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: hoppeiakwon et al. 2014 type species hoppeia youngheungensis species h. youngheungensis