A strictly aerobic, red-pigmented, non-motile, catalase- and oxidase-positive, Gram-staining-negative bacterium, designated strain CNURIC011$^T$, was isolated from seawater off the coast of Jeju Island in Korea. A phylogenetic analysis based on 16S rRNA gene sequences showed that strain CNURIC011$^T$ belongs to the genus Aquimarina in the family Flavobacteriaceae. 16S rRNA gene sequence analysis revealed that the close relatives of the novel strain are Aquimarina latercula ATCC 23177$^T$, Aquimarina marcrocephali JAMB N27$^T$, Aquimarina intermedia KMM 6258$^T$, Aquimarina muelleri KMM 6020$^T$, and Aquimarina brevivitae SMK-19$^T$, with sequence similarities of 97.6, 96.6, 96.0, 95.6, and 94.2%, respectively. DNA-DNA hybridization revealed that the level of relatedness between strain CNURIC011$^T$ and Aquimarina latercula ATCC 23177$^T$ (=KCTC 2912$^T$) was 4.9%. The DNA G+C content was 35.8 mol% and the major respiratory quinone was MK-6. The major fatty acids were iso-$C_{15:0}$ (14.9%), $C_{15:0}$ (13.9%), iso-$C_{17:0}$ 3-OH (12.6%), iso-$C_{15:1}$ G (7.3%), and iso-$C_{17:1}{omega}9c$(7.2%). On the basis of phenotypic, phylogenetic, and genotypic data, strain CNURIC011$^T$ represents a novel species within the genus Aquimarina, for which the name Aquimarina litoralis sp. nov. is proposed. The type strain is CNURIC011$^T$ (=KCTC 22614$^T$ =JCM 15974$^T$).