Identification of Easily Mixed Species of Famous Fish

With the development of the socialist market economy and the improvement of people's living standards, there has been a new take-off in the development of fishery production, especially the rapid development of famous and high-quality fish in recent years, but because some famous and high-quality fish are very similar in appearance, it is difficult to identify, which has caused certain difficulties to the majority of farmers and consumers. Now the identification methods of easy-to-mix species of famous and high-quality fish are introduced to everyone for reference. 1. Pelteobagrus fulvidraco, Pelteob The body of Pelteobagrus fulvidraco is longer and slender, the body length is usually more than 4.6 times of body height, and the anterior distance of dorsal fin is less than 1 pound 3 of body length; while Pelteobagrus fulvidraco and Pelteobagrus fulvidraco, Pelteobagrus fulvidraco and Pelteobagrus fulvidraco, the pectoral fin of Pelteobagrus fulvidraco and Pelteobagrus fulvidraco has a smooth leading edge and a strong serrated posterior edge. 2. Southern catfish, catfish, moustache catfish, catfish, catfish The dorsal fins of the catfish (called native catfish in some places) and the southern big mouth catfish are very short. The identification method is as follows: the mouth of the southern catfish is large, the end is at least opposite to the middle of the eyeball, the front edge of the pectoral fin is smooth and has no obvious serrated, the upper lobe of the caudal fin is obviously longer than the lower lobe, the back and side of the body are uniform, there are no markings on the back, and there are black spots on the ventral side of the head of the juvenile fish. The adult has 2 pairs of moustaches, and the young fish with a body length of 10 cm ~ 15 cm have a second pair of mandibular whiskers; usually 3 ~ 4 years old, more than 3 kg to reach sexual maturity, and the mature eggs are oily yellow. The catfish mouth is small, the end is only opposite to the anterior edge of the eyeball, the anterior edge of the pectoral fin is obviously serrated, the depression between the upper and lower leaves of the caudal fin, the upper and lower leaves are equal in length and symmetrical, and the back and the side of the body have alternating colors and irregular cloud spots; there are 2 pairs of whiskers, the moustache is longer and the chin is shorter; about 75 grams of 1-2-year-old sexual maturity, mature eggs are grass-green. Among the three kinds of fish, snakehead, snakehead, snake The black carp body is longer, the head and back is in the shape of "seven stars", and the number of lateral line scales is 63 ~ 69, while the spot body is shorter, the head back is in the shape of "188", and the lateral line scales are 58 ~ 60. 4. There are many species of Siniperca chuatsi and Siniperca chuatsi, including 3 genera and 10 species. The most common species are Siniperca chuatsi (Siniperca chuatsi) and Siniperca chuatsi. The distinguishing method is as follows: 1. The eyes of Siniperca chuatsi are smaller and larger than those of Siniperca chuatsi. The maxilla of Siniperca chuatsi extends below the posterior edge of the eye, while the maxilla of Siniperca chuatsi extends only below the posterior edge of the eye. The growth rate of Siniperca chuatsi is more than 4 times faster than that of Siniperca chuatsi under the same conditions. However, it should be noted that the growth rates of the two kinds of fish are about the same at the seedling stage. 5. Japanese eel, European eel, American eel and Australian eel can be identified by drug testing. if they are soaked in butene phosphorus solution of 0.46 g / m3, the Japanese eel will not die within 1 hour. You can also use the "ou Qingtian" test to measure the 24-hour lethal concentration of Japanese eel 6 g / cubic meter and European eel 0.4 / g cubic meter. Siberian Sturgeon, Schrenckii Sturgeon, Darkshire Sturgeon, Chinese Sturgeon, Naked abdominal Sturgeon, small body Sturgeon, Missouri shovel Sturgeon, Mississippi shovel Sturgeon, Yangtze River White Sturgeon, spoon White Sturgeon. Siberian Sturgeon has 5 rows of bone plates, 4 snout beards, spray holes on the head, small mouth fissure, not reaching the cephalic side, unconnected operculum, the back of the kiss has a bone plate, must be cylindrical, and the lateral bone plate of the body is less than 58; the center of the lower lip is interrupted; the lower lip of Sturgeon Sturgeon is intact, the dorsal fin is less than 40; the dorsal fin of Sturgeon is more than 40, the Gill rake is triangular flake, arranged closely, and the skin of juvenile fish is rough. The Gill rake of Chinese Sturgeon is short column, the arrangement is sparse, the skin of juvenile fish is smooth; the lateral bone plate of naked abdominal Sturgeon is more than 58; the lower lip is intact; the lower lip of corpuscle Sturgeon is interrupted in the center of the lower lip; the mouth fissure is large, sometimes reaching the head side, the Gill cover membrane is connected, the kiss back is cartilaginous, and the side is flat; Missouri shovel Sturgeon has no water holes, the abdomen is exposed, the dorsal fin is more than 37, and the gluteal fin is less than 24; the Mississippi shovel Sturgeon has a small skin plate in the abdomen, more than 36 dorsal fins and less than 23 gluteal fins. The Changjiang White Sturgeon is exposed, only the upper leaves of the caudal fin have spiny hard scales, 2 snout whiskers, the mouth is retractable, the snout is conical and sword-shaped, and the mouth of the spoon Sturgeon is not telescopic and the snout is flat. In addition, some famous and high-quality fish are similar in appearance, which should be identified when buying or consuming, otherwise they will bring unnecessary losses to themselves.