Will the use of fresh raw fish can feed, such as snakehead, mink and so on do, and now raw fish and freshwater sea the price of raw fish is about how much / jin?

• 请问用淡水小杂鱼可以喂养如黑鱼、貂等吗，现在海水小杂鱼和淡水小杂鱼的价格大约是多少/斤？