marinibacterium marinibacterium marinibacterium is a gram-negative genus of bacteria from the family of rhodobacteraceae with one known species (marinibacterium profundimaris). marinibacterium profundimaris has been isolated from deep seawater from the atlantic ocean. marinibacterium scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: marinibacteriumli et al. 2015 type species marinibacterium profundimaris species m. profundimaris