spiribacter aquaticus spiribacter aquaticus spiribacter aquaticus is a gram-negative and moderately halophilic bacterium from the genus of spiribacter which has been isolated from a solar saltern from santa pola in spain. spiribacter aquaticus scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: chromatiales family: ectothiorhodospiraceae genus: spiribacter species: s. aquaticus binomial name spiribacter aquaticusleón et al. 2017 type strain cect 9238, lmg 30005, strain sp30