1. The dragonfly, also known as the water turtle beetle, is the collective name for all species and genera of the family Dragonidae. It belongs to the insect class Coleoptera, the carnivorous suborder Dragonidae, and is a precious aquatic insect that has emerged as an edible species in recent years. Live in fields, ditches, streams and other water bodies. It can swim in water, fly out of water, and has strong phototaxis. Adult dragon lice are oval in shape and about 3 cm long. Dragon lice vary in size and are streamlined. They are mainly carnivorous and also eat plants. They are especially good at catching small fish, shrimps and aquatic insects in the water for food. In my country, it is mainly produced in Guangdong, Guangxi, Hainan, Fujian, Hunan, Hubei and other provinces and regions. At present, most sources of dragon lice in the market rely on the capture of wild resources. Due to water pollution and excessive human hunting, the number is decreasing day by day, causing the market supply to exceed demand, resulting in higher prices.

2. Although dragon lice are expensive, they are loved by people. The reason is that in addition to the delicious "harmony" taste when eaten fresh, it also has high medicinal value. According to records, dragon lice have the effects of nourishing yin and nourishing the kidneys, etc., and are effective in treating enuresis in children, frequent nocturia in the elderly, kidney qi deficiency, and malnutrition. Regular consumption of dragon lice also has good effects on lowering cholesterol, preventing and treating high blood pressure, obesity, nephritis, etc. In addition to being eaten fresh, dragon lice can also be processed into powders, infusions (such as dragon lice wine), pills and other therapeutic products. Therefore, the market sales are very good and the breeding development prospects are quite promising.

3. There are many species of dragon lice, including 160 species in my country alone, among which the Japanese sucking dragon louse is the largest individual. According to trial breeding, this originally wild dragon louse can be artificially cultured, and it has been successfully cultured in our province and other places. The breeding cycle of dragon lice is short (it takes about 8 months from eggs to commercial adults), and it does not have high requirements for dissolved oxygen, water temperature, pH, etc., and it has less disease, has a wide range of food habits, and is easy to breed and manage; the dragon lice are small in size and occupy a large area. The water body space is also small, so it is suitable for farming in large water bodies such as fish ponds, as well as in small water bodies such as cement ponds of a few square meters or even smaller water tanks; the breeding cost is low, and snails and apple snails distributed in various places can be collected. Snails, fresh dead fish and shrimps, various animal scraps from the slaughterhouse, etc. are directly put into the pond for feeding. Occasionally, corn flour, wheat bran and other energy feeds are mixed with water, kneaded into balls, and dried in the sun before feeding. . Therefore, various localities can actively research and develop breeding according to market needs.