Without a head and foot, the color white. Myiasis protein-rich, full range of essential amino acids, is a new, inexpensive source of protein feed. At present, despite China's aquaculture farms are the largest production scale and first in the world, but it has faced culture of environmental degradation, diseases and frequent source of feed shortage of a range of issues, particularly the feed source of the problem, resulting in China's aquaculture The healthy development of industry. As the aquaculture brass ball valve industry in rapid development, a shortage of protein feed their development bottleneck. China's serious shortage of protein feed resources, at present, protein feed gap, 1996, 1997 China's annual imports of fish meal in the world in the proportion of 27%, is the world's largest fishmeal imports of the proportion brass ball valve   of 27%, Is the world's largest importer of fishmeal. There is a growing desire a cheap source of protein feed to replace fish meal and soybean feed raw materials to alleviate the pressure caused by the lack of. brass ball valve Strong ability to fly breeding, production of great potential, it is estimated that one pair of flies breeding 10-20, 2001 and, four months can yield 266 billion myiasis, cumulative net production of 600 tons or more, so as a new development myiasis Feed protein source is the ease China's current lack of raw materials of aquatic feed one of the ways. The study shows that, myiasis is not only a quality of the aquatic food, but also many other aspects of the role, this is China's aquaculture industry to the healthy development has brought new hope. 1, accelerated the growth of aquatic animals Myiasis contain crude protein 64.6 percent, than its domestic crude protein content of fish meal to be higher than the 33.8 percent, myiasis than the nutritional value of crude earthworm eggs three times higher. It is rich in mineral elements, such as aluminum, potassium, sodium, manganese, copper, etc., but also brass ball valve   rich in amino acids. Experiments show that by myiasis feeding the many animals, the effect of weight gain over the famous Peruvian fishmeal. In the same conditions, so that grass carp of 20.08 percent increase; myiasis fed by soft-shelled turtles, their weight gain than the rate of 120.79 percent higher Weiji yolk. Myiasis used for feed additive, can significantly reduce the amount of feed and feed costs and improved feed quality. Therefore, no matter from the nutritional value, or cost, myiasis have great advantages is inexpensive high-energy feed additive. Zhou Yongfu, etc. (1997) with myiasis feeding within one month of soft-shelled turtle Zhibie, the average weight gain for each 4.53 g, average weight gain rate of 160.27 percent, the average weight by about feeding the egg yolk Zhibie 3.8 times. Therefore, the development and utilization of myiasis protein feed, will be China's aquaculture production of protein feed a new alternative. Are reported in the literature, with myiasis feeding Bullfrog, Bullfrog rapid growth, less disease, and meat than in the past have significantly improved. Practice has proved that with myiasis fed shrimp, rice field eel, grass carp, and special aquatic products, such as can produce good results. At present, China's aquaculture industry, regardless of mariculture, or are facing freshwater aquaculture feed poor quality, balanced nutrition and other issues, animal breeding and feeding, not only the low utilization rate, and pollution of water bodies, leading to excessive nutrients in the water, The proliferation of pathogenic microorganisms and trigger aquatic animal diseases, caused by the aquaculture industry lags behind development. The development of sterile maggots breeding flies to myiasis to replace water and trash fish, such as soybean protein raw materials, changes in natural food is scarce resources of the status quo, aquatic animals to reduce the  brass ball valve   incidence of the disease in order to promote the health of aquaculture development.  brass ball valve