marinobacterium halophilum marinobacterium halophilum marinobacterium halophilum is a gram-negative bacterium. marinobacterium halophilum scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: alteromonadaceae genus: marinobacterium binomial name marinobacterium halophilumchang et al. 2007