Guillow fish. The price of guppy is 126 yuan per catty, and yellowtail sells for 20-30 yuan per catty. Gui fish farming is extremely difficult, wild gui fish and far from meeting market demand, so the price is higher than yellowtail. Gui fish body fat meat thick, tender meat, thick, less spiny, nutritious, delicious flavor, so the value is not expensive. Guppy is a freshwater fish in the genus Siniperca of the order Perciformes. Total length of about 28 centimeters, the body shape is fusiform, the body is higher, laterally compressed, back bulge, the back edge of the front gill cover bone is serrated dorsal fin long, the back of the body is yellowish-green, the abdomen is yellowish-white, the body on both sides of the size of the irregular brown stripes and plaques.