The horse mouth fish, also known as the large mouth steak, red carrion, and peach blossom fish, is a ferocious freshwater fish. It has a long, laterally flattened body, a long muzzle and a large mouth, and is good at preying on small fish and aquatic insects. Its body color is unique, with a gray-black back, a silver-white belly, light blue stripes on the side of the body, and an orange-red hue in the male during the breeding season.

The horse chestnut is found in Korea, Japan, and China, especially in mountain streams and rapids with rocky bottoms. This fish has a wide variety of habitats and has shown great adaptability. Its unique ecological niche makes it an important part of freshwater ecosystems.