A novel Gram-stain-negative, aerobic, rod-shaped, reddish-orange-coloured, gliding bacterial strain, designated L12M1 , was isolated from the gut of the Korean scallop, . Phylogenetic analysis based on 16S rRNA gene sequence revealed that strain L12M1 formed a monophyletic clade with the strains in the genus and showed highest 16S rRNA gene sequence similarity to YS10 (98.66 %). The major cellular fatty acids of strain L12M1 were iso-C and C ω6,9,12,15 . The predominant isoprenoid quinone was MK-7. The major polyamines were spermidine, cadaverine and the minor polyamine was putrescine. The DNA G+C content was 32.1 mol%. The phylogenetic, phenotypic, biochemical, chemotaxonomic and genotypic results indicated that strain L12M1 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is L12M1 (=KCTC 62750 =JCM 33169 ).