oceanobacter oceanobacter oceanobacter is a bacteria genus from the family of oceanospirillaceae with one known species (oceanobacter kriegii). oceanobacter scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: oceanospirillales family: oceanospirillaceae genus: oceanobactersatomi et al. 2002 type species oceanobacter kriegii species o. kriegii