marinospirillum insulare marinospirillum insulare marinospirillum insulare is a helical, gram-negative and halophilic bacterium from the genus of marinospirillum which has been isolated from fermented fish brine from the niijima island on japan. marinospirillum insulare scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: oceanospirillales family: oceanospirillaceae genus: marinospirillum species: m. insulare binomial name marinospirillum insularesatomi et al. 2004 type strain lmg 21802, nbrc 100033, satomi k