pelagimonas pelagimonas pelagimonas is a gram-negative, heterotrophic and aerobic genus of bacteria from the family of rhodobacteraceae with one known species (pelagimonas varians). pelagimonas varians has been isolated from seawater from the north sea in germany. pelagimonas scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: pelagimonashahnke et al. 2013 type species pelagimonas varians species p. varians