A Gram-stain-negative, aerobic, non-spore-forming, motile by single polar flagellum and ovoid or rod-shaped bacterial strain, designated JBTF-M23, was isolated from tidal flat sediment collected from the Yellow Sea, Republic of Korea. Neighbour-joining phylogenetic tree of 16S rRNA gene sequences showed that strain JBTF-M23 fell within the clade comprising the type strains of species, clustering with the type strains of and . Strain JBTF-M23 exhibited the highest 16S rRNA gene sequence similarity value (98. 6 %) to the type strain of and sequence similarities of 98.3 and 97.7 % to the type strains of and respectively. The DNA G+C content of strain JBTF-M23 from genomic sequence data was 41.98 %. The ANI and dDDH values between strain JBTF-M23 and the type strains of , and were 71.3-76.6 and 19.4-19.9 %, respectively. Strain JBTF-M23 contained Q-8 as the predominant ubiquinone and C7 and/or C6, C and C7 as the major fatty acids. The major polar lipids of strain JBTF-M23 were phosphatidylethanolamine and one unidentified aminolipid. Distinguished phenotypic properties, along with the phylogenetic and genetic distinctiveness, revealed that strain JBTF-M23 is separated from recognized species. On the basis of the data presented, strain JBTF-M23is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is JBTF-M23(=KACC 19900=NBRC 113647).