Japanese Red Rockfish

Sebastes inermis has sharp lachrymal spines with the rest of the spines on the head are rather weak. The caudal fin is not strongly emarginate. It has a dark red or pale brown body on the back and flanks. The pectoral fins reach beyond the level of the anus when held down., The pectoral fins have 15 rays while the anal fin has 7 rays. This species grows to a total length of 35.9 cm (14.1 in), and the heaviest recorded specimen weighed 800 g (1.8 lb).

Sebastes inermis it occurs from southern Hokkaido southward to Kyushu, Japan, and the southern part of the Korean Peninsula. It is a demersal fish with pelagic juveniles which live among floating mats of seaweeds.