Blackfish. Blackfish individual large, fast-growing, high economic value; blackfish less bone spines, high meat content, and rich in nutrients, higher than the protein contained in chicken and beef. The market price of blackfish is 23 yuan/catty. Catfish is sweet and warm in nature, with the effect of nourishing yin and replenishing the deficiency, strengthening the spleen and opening the stomach, promoting menstruation and breastfeeding, and diuretic and swelling. Nutritious, more fresh food, can be stewed, roasted fish, flavorful. The market price of catfish is 8 yuan / catty. 23 is greater than 8, so the blackfish is more expensive.