pararhodobacter pararhodobacter pararhodobacter is a gram-negative genus of bacteria from the family of rhodobacteraceae with one known species (pararhodobacter aggregans). pararhodobacter aggregans has been isolated from a marine aquaculture system from rehovot in israel. pararhodobacter scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: pararhodobacterfoesel et al. 2013 type species pararhodobacter aggregans species p. aggregans