Brief introduction of yellow feed for Monopterus albus culture has nothing to do with eel, but is closely related to Perciformes. Found in tropical fresh water or salty fresh water. It is about 20.70 cm (8.28 inches) long and has no scales or very small scales. The dorsal fin and anal fin are very low and continuous around the tail end. Gills usually have only one external gill hole in the throat. Some kinds of gills are very small and rely on oxygen inhaled through the throat or intestinal mucosa to breathe. In the East, it is a kind of precious edible fish, which is often kept in ponds or rice fields. Monopterus albus: Scaleless, it can stand upright in shallow water, breathe to the surface through the mouth, and store air in the mouth and throat, so it looks swollen. Freshwater edible fish, widely distributed in Southeast Asia, are produced everywhere except the northwest plateau, inhabiting ponds, rivers, rice fields and other places, often lurking in mud pits or crevices. Go out for food at night. The reproductive situation is quite special. She was a female when she was young, and after a reproduction, she became a male. This phenomenon is called sex reversal. Morphological characteristics: the body is slender and snake-shaped, with a flat front and a narrow tail. The head is long and round. The mouth is big, the end position, the upper jaw is slightly prominent, and the lips are quite developed There are fine teeth on the upper and lower jaws and flap bones. Eyes are small and covered with a thin layer of skin. The left and right branchial holes merge into one on the ventral surface, showing a V-shape. The branchial membrane is connected with the branchial isthmus. Generally, there is lubricating liquid on the body surface, which is easy to escape and has no scale. No pectoral fins and ventral fins; The dorsal fin and anal fin degenerate, leaving only skin folds, no soft spines, and all of them are integrated with the caudal fin. Most of them are yellowish brown, yellow or orange with dark gray spots, and a few eels are white. Monopterus albus, commonly known as "white eel", is a tropical and warm temperate fish. It is a benthic fish with strong adaptability and can survive in rivers, lakes, ditches and rice fields. During the day, I like to dig holes in humus mud or in the cracks with water on the embankment. Little activity during the day, foraging at night. Gills are underdeveloped, but they can breathe air directly with the help of the epidermis on the inner wall of oral cavity and laryngeal cavity as an auxiliary organ for breathing; Eels can survive when the oxygen content in water is very low. After coming out of the water, as long as you keep your skin moist, you won't die in a few days. Monopterus albus is an omnivorous fish, which feeds on various small animals. It is greedy and eats most vigorously in summer. Long-term consumption in cold season will not kill you. The breeding season of Monopterus albus is from June to August, and its individual development has the characteristics of sex reversal, that is, from embryonic stage to first sexual maturity, it is female (that is, the gonads of individuals less than 35 cm in length are all ovaries); After laying eggs, the ovary gradually becomes the testis; When the body length is 36-48 cm, it is partially reversed, and the male and female individuals are almost equal; Most of them grow to more than 53 cm for testicles. When the young fish can only grow to 20 cm, the 2-winter-old female fish will reach maturity and have a body length of at least 34 cm. The largest individual can reach 70 cm and weigh 1.5 kg. Monopterus albus lays eggs near the cave where it lives. Before laying eggs, it will spit out foam to build a nest. The fertilized egg develops on the water surface with the help of the buoyancy of foam. Both male and female fish have the habit of protecting nests. Eel's body is cylindrical, suitable for cave life, which is very beneficial for entering and leaving caves and reducing friction. It's really a bit of a hermit. It has no special attack skills and no powerful defensive weapons. Its only skill is "36 tricks, escape is the best policy." It has neither pectoral fin nor ventral fin, and even dorsal fin and gluteal fin are degraded to only a little skin fold, and scales are invisible to the naked eye. But the whole body can secrete very oily mucus. If you are not careful, it will slip away from you. The main functions of eel mucus are: preventing bacteria and germs from infecting the body and reducing diseases; Prevent parasitic animals and plants from winding, which is beneficial to growth; A smooth surface helps it move smoothly in the mud. Eel embryos are female at the first sexual maturity, but they become male at the second sexual maturity. In other words, Monopterus albus is both a mother and a father in his life. This process of yin-yang transformation is biologically called sex reversal. Most fish breathe through gills, but eels are unique. Its gills degenerate, and air is directly absorbed by tiny blood vessels on the surface of the throat. Therefore, in order to make eels fresh, we must keep them moist and store them in a cool place. It is distributed in Southeast Asia, and this fish is found in all waters of China except the western plateau. Foreign countries have reached western Korea, southern Japan, the Philippines, Java and Myanmar. Monopterus albus is widely distributed in lakes, rivers, reservoirs, ponds and ditches all over the country. Except for the northwest plateau, it has been recorded everywhere, especially in the Pearl River basin and the Yangtze River basin, which is rich in Monopterus albus. Monopterus albus is mainly distributed in Thailand, Indonesia, the Philippines and other places abroad, and is also produced in India, Japan and North Korea.

The management of soilless culture of Monopterus albus is convenient, and the industrial culture of high-yield Monopterus albus is changed from traditional soil culture and outdoor still water culture to soilless and indoor and outdoor running water culture, with convenient management, high yield and good benefit. Its production technical index is: put 2-2.5 kilograms of eel fry with specifications of 25-40 grams per 1 square meter, and feed them with complete compound feed. After feeding for 4-5 months, the production cost is 15-20 yuan/kg according to the current raw material cost. The technical points are as follows: Choose a place with clean water source to build ponds, which are divided into outdoor and indoor areas, each with an area of 2-20 square meters and a depth of 0.5 meters. The pond is polished with cement, and the ridge of the pond is 0.5 cm wide and equipped with a reservoir. The aquaculture pond requires free drainage and irrigation, and aquatic plants are planted in the pond, covering 70% of the pond water surface. Select high-quality eel fry and place them in a ratio of 2-2. Kg/m2. It is best to choose artificially propagated eel fry, sterilize the fish and then put it in. Injured seedlings can't be used. Eel seedlings fed with complete compound feed were domesticated before entering the pond, and then fed with compound feed. Before feeding, the finished feed should be prepared, that is, 25% fresh fish pulp should be added to the finished feed to make noodle bait with a diameter of 3-4 mm, and the feeding amount should be 1%-2% of the body weight of Monopterus albus. Monopterus albus has feeding inertia. When it is used to a certain kind of bait, don't change it casually, otherwise it will seriously affect the growth of Monopterus albus. Strengthen daily management, keep running water 10 hour every day, and pay attention to sewage discharge, rodent prevention and flooding prevention. Pay attention to the regular application of insect repellent and bactericidal drugs in the disease prevention and treatment pool to eliminate dead eels and sick eels. If wild eel fry is used, the early infection rate of prickly head is very high, so it is necessary to deworm before releasing the fry. You can choose "Bandung 1" or "Bandung No.3" for deworming.