spongiimicrobium spongiimicrobium spongiimicrobium is a gram-negative, strictly aerobic, rod-shaped and chemoheterotrophic genus of bacteria from the family of flavobacteriaceae with one known species (spongiimicrobium salis). spongiimicrobium salis has been isolated from a marine sponge from japan. spongiimicrobium scientific classification domain: bacteria phylum: bacteroidota class: flavobacteria order: flavobacteriales family: flavobacteriaceae genus: spongiimicrobiumyoon et al. 2016 type species spongiimicrobium salis species s. salis