The right-eye flounder (*Pleuronectes platessa*) is a benthic fish species belonging to the order Pleuronectiformes and the family Pleuronectidae. It is widely distributed across the cold-temperate waters of the North Pacific and the Sea of Japan and is considered an important commercial species. The fish has a flattened, asymmetrical body with both eyes located on the right side. Its body is generally brown, marked with irregular reddish-orange spots, providing excellent camouflage against the seafloor.

Right-eye flounders typically inhabit shallow coastal areas with sandy or muddy bottoms, commonly found at depths between 30 and 200 meters. They feed on small benthic organisms such as crustaceans, mollusks, and polychaetes. Adult individuals generally range from 40 to 60 cm in length, with some reaching over 70 cm.

This species is prized for its white, delicate flesh with moderate fat content. Rich in high-quality protein, DHA, and essential minerals, it offers a mild yet refined flavor. It is widely used in Japanese cuisine, especially in dishes such as sashimi, nimono (simmered dishes), and grilled preparations. The right-eye flounder is a popular ingredient in both high-end dining and home-style cooking in Japan.