alginatibacterium alginatibacterium alginatibacterium is a gram-negative, strictly aerobic and rod-shaped bacteria genus from the family of alteromonadaceae with one known species (alginatibacterium sediminis). alginatibacterium sediminis has been isolated from coastal sediments. alginatibacterium scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: alteromonadaceae genus: alginatibacteriumwang et al. 2019 species a. sediminis