Salmon. Salmon and grouper, salmon is expensive, the market price of salmon is more than 100 yuan a catty, and the market price of grouper ranges from 20 yuan a catty to 40 kilograms. Epinephelussp. belongs to the order Perciformes, with an oval body and a slightly flat side. The mouth is large, with auxiliary maxilla and fine teeth, and some of them expand into canine teeth. The body is covered with a small comb, sometimes buried under the skin.