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A Gram-stain-negative, aerobic, yellow-pigmented, flexirubin-negative, rod-shaped and non-motile bacterial strain, PAMC 28998 T , was isolated from a surface sediment sample collected from the Canadian Beaufort Sea. Strain PAMC 28998 T grew at 4-37 °C (optimum, 25 °C), at pH 7.0-9.0 (optimum, pH 7.5) and in the presence of 1.0-10.0 % (w/v) NaCl. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that strain PAMC 28998 T belongs to the genus Antarcticibacterium showing the highest sequence similarity (96.8 %) with Antarcticibacterium flavum JB01H24 T . The average nucleotide identity and genome-to-genome distance values between PAMC 28998 T and the most closely related species ( A. flavum JB01H24 T ) were 74.1 and 18.5 %, respectively, indicating that strain PAMC 28998 T is clearly distinguished from A. flavum . The genomic DNA G+C content calculated from genome sequences was 39.8 %. The major fatty acids (>10 %) were iso-C 15 : 0 (19.5 %), anteiso-C 15 : 0 (18.0 %), iso-C 16 : 0 (11.6 %) and summed feature 3 (C 16:1 ω6 c and/or C 16:1 ω7 c ; 11.4 %). The major polar lipids were phosphatidylethanolamine, aminoglycolipid, two unidentified aminolipids, three unidentified phospholipids and four unidentified lipids. The major respiratory quinone was MK-6. Based on the phylogenetic, genomic and phenotypic data presented here, strain PAMC 28998 T is considered to represent a novel species of the genus Antarcticibacterium , for which the name Antarcticibacterium arcticum sp. nov. is proposed with the strain PAMC 28998 T (=KCCM 43316 T =JCM 33514 T ).