Grouper farming cost is high. According to the query related public information, grouper fry price of 6 yuan a, each square meter pond can put about 35 fish fry, then an acre of fish fry cost of 6 times 667 times 35 equals 140070 yuan. The biggest advantage of Mandarin fish farming is the low cost of farming, raising adult fish costs only 13 to 16 yuan a catty.