aquiflexum aquiflexum aquiflexum is a gram-negative, aerobic, heterotrophic and non-motile bacterial genus from the family of cyclobacteriaceae with one known species (aquiflexum balticum). aquiflexum scientific classification domain: bacteria phylum: bacteroidota class: cytophagia order: cytophagales family: cyclobacteriaceae genus: aquiflexumbrettar et al. 2004 type species aquiflexum balticum species a. balticum