Dragonfish, which belongs to the bonoglossaceae, is a large freshwater fish. It existed as early as the Carboniferous. The discovery of the fish began in 1829 in the Amazon basin of South America, when it was named by American ichthyologist Vandell.
Brief introduction of African dragonfish
Dragon fish is a kind of ornamental fish which is widely used as Fengshui fish. Its origin is called arowana. The Chinese pronunciation is' arowana ', which means' long tongue' in Spanish. Its scientific name is "Scleropages", which means tongue and hard pharynx. According to taxonomy, the dragon fish belongs to Osteoglossidae (Osteoglossidae, also known as osteopharyngeae). Dragon fish is widely distributed in South America, Australia and other subtropical areas, and it is also commonly known as dragon fish because of its body shape similar to that of China.
Dragonfish, which belongs to the bonoglossaceae, is a large freshwater fish. It existed as early as the Carboniferous. The discovery of the fish began in 1829 in the Amazon basin of South America, when it was named by American ichthyologist Vandell. In 1933, the French ichthyologist Dr. belughlan discovered the red dragonfish in Saigon, Vietnam. In 1966, French ichthyologist Bulan and dopaton discovered another species of longfish in Phnom Penh. After that, experts and scholars from some countries successively found other dragon fish species in Vietnam, Malaysia Peninsula, Sumatra, Banga Island, biborneo and Thailand, so they divided them into golden dragon fish, orange red dragon fish, golden dragon fish, platinum dragon fish, green dragon fish and silver dragon fish. The real introduction of aquarium as an ornamental fish began in the United States in the late 1950s and gradually became popular around the world in the 1980s.
The standard of African dragonfish
Dragon fish is a kind of freshwater fish. According to the classification, it can be divided into several categories. Different types of dragon fish also have their own characteristics, and the price of dragon fish in different products will vary greatly. The small-sized version takes the medium-sized dragon fish with a length of 25 cm as the standard, which will give you a brief introduction of the standard of dragon fish.
1、 Color: according to the variety of dragon fish to appreciate the color it should have. Of course, the brighter, the better.
2、 Body shape: the proportion of each part should be even and have a majestic momentum.
3、 Scale: it should be neat, bright and smooth without deformation, and should match the color of the variety.
4、 Beard: long and straight.
5、 Fin: the fins of all parts shall be large and open, and the stem bone shall be smooth without distortion.
6、 Gill: it should match with the radian of the fish body, the soft part of the edge of the gill cover should be flat with the fish body, and the gill cover should have the proper color and brightness.
7、 Eyes: be bright and have spirit, without looking down.
8、 Mouth: it should be closed tightly, and there should be no protruding phenomenon and dewlap in the lower jaw (meat block formed by rubbing the water tank glass).
9、 Teeth: they should be neat and dense, and there should be no defect or discoloration.
10、 Anus: to be flat with the belly of the fish and not protrude.
11、 Swimming posture: slow and generous when swimming, and smooth when turning.