金鱼在我国是非常受人们欢迎的观赏鱼类。近年来,随着人们生活水平的提高,金鱼的养殖业发展很快。在实际生产上,人们多用小型水泥池饲养金鱼,它效果虽好,但投资过大,使得金鱼的养殖成本较高,而利用池塘饲养金鱼,由于金鱼的活动力弱,觅食力差,易受敌害生物侵袭,致使其生长慢,成? Goldfish in our country is very popular ornamental fish. In recent years, with the improvement of people’s living standards, goldfish aquaculture has developed rapidly. In actual production, people use small cement ponds to raise goldfish more. Although the effect is good, the investment is too large, making the goldfish breeding cost is higher. However, the use of ponds to raise goldfish, because of the weak activity of goldfish, poor feeding, easy Invasion by enemy organisms, resulting in its slow growth, into?