actibacterium pelagium actibacterium pelagium actibacterium pelagium is a gram-negative, rod-shaped and non-motile bacterium from the genus of actibacterium which has been isolated from seawater from the pacific ocean. actibacterium pelagium scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodobacterales family: rhodobacteraceae genus: actibacterium species: a. pelagium binomial name actibacterium pelagiumguo et al. 2017 type strain cgmcc 1.16012, kctc 52653, strain jn33