Oriental grouper: culture conditions: the cement pond covers an area of 30m240m2, the water depth is about 1.2m, the bottom of the pond is inclined to the center, and it is equipped with a complete water supply, gas supply, power supply and heating system. The water temperature is 22℃ and 29℃, the salinity is 2532, the pH is pH7．88.6, and the dissolved oxygen is above 5 mg/L. Tiger spot: Jin Hu grouper is a kind of widespread freshwater fish, which grows at an appropriate temperature of1~ 40℃ and has the habit of feeding and growing all the year round. Its pH value adapts to 6.5 ~ 8.5, and it shows high adaptability and endurance when oxygen drops to 3.8mg per liter.