actibacterium atlanticum actibacterium atlanticum actibacterium atlanticum is a gram-negative and non-motile bacterium from the genus of actibacterium which has been isolated from seawater from the atlantic ocean. actibacterium atlanticum scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: actibacterium species: a. atlanticum binomial name actibacterium atlanticumli et al. 2015 type strain lmg 27158, mccc 1a09298, strain 22ii-s11-z10