That big, wide and flat snakehead is probably a treasure fish. The maximum length of an adult turbot is 75 cm. Its side is flat and oval. Its eyes are on the left side of its head. It is not only strange in appearance, but also rich in gum under the skin and fins. Its head and tail fins are very small and its fins are cartilage. There are no small bones in the body, the bones are as white as jade, the visceral mass is small, the meat yield is high, and the muscles are rich and tender. The morphology of PARALICHTHYS olivaceus is similar to that of PARALICHTHYS olivaceus in China, with flat side and oval shape. Both eyes are located on the left side of the head and the left side of the body is light brown with irregular spots. The abdomen is light in color and can change with the surrounding environment, thus hiding the body and avoiding the enemy. Duobao fish is approximately round; One side with eyes is blue-brown, with punctate melanin and a small amount of thorns, but no eyes.