A Gram-staining-positive, aerobic, non-motile and rod-shaped bacterium, designated P27(T), was isolated from a traditional fermented seafood. The isolate grew optimally with 0-2.0 % (w/v) NaCl and at pH 6-7 and 30 degrees C. The predominant menaquinones were MK-12 and MK-11. The major cellular fatty acids were anteiso-C(17 : 0), anteiso-C(15 : 0) and iso-C(16 : 0). The major cell-wall sugars were galactose, mannose and rhamnose. The peptidoglycan amino acids of strain P27(T) were 2,4-diaminobutyric acid, alanine, glutamic acid and glycine. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and an unidentified glycolipid. The genomic DNA G+C content of strain P27(T) was 69.0 mol%. Based on its 16S rRNA gene sequence, strain P27(T) showed highest pairwise similarity with Agromyces cerinus subsp. cerinus JCM 9083(T) (97.0 % similarity). Based on phenotypic, genotypic and phylogenetic studies, strain P27(T) represents a novel species in the genus Agromyces, for which the name Agromyces atrinae sp. nov. is proposed. The type strain is P27(T) (=KCTC 19593(T) =JCM 15913(T)).