gemmobacter aquaticus gemmobacter aquaticus gemmobacter aquaticus is a gram-negative, rod-shaped, non-spore-forming and motile bacterium from the genus of gemmobacter with a single polar flagellum which has been isolated from water from the daqing reservoir in china. gemmobacter aquaticus scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: gemmobacter species: g. aquaticus binomial name gemmobacter aquaticus(liu et al. 2010) chen et al. 2013 type strain cgmcc 1.7029, a1-9 synonyms catellibacterium aquatile