Grouper. Grouper is 30 yuan a catty and blackhead is 28 yuan a catty. Grouper has rich nutrition, meat, low fat, high protein and other characteristics, in Hong Kong and Macao is considered one of China's four famous fish, is a high-grade feast must be above the top of the edible fish. It is expensive and has high economic value, and is one of the important cultured fish in the coastal area of China, and it has been widely raised in China and Southeast Asian countries. Grouper farming is more, blackhead fish farming is very little, the nutritional value of the meat is not as high as grouper.