Silver Dragonfish life span can get 6-7 years.
The bishop's bony tongue fish is also known as the silver dragonfish. The adult fish is between 50-70 centimeters in length and can grow up to 120 centimeters. It is a medium to large freshwater fish. The body is banded. The cleft of the mouth is obviously downward sloping, the lower jaw covers the upper jaw, and the lower jaw has a structure similar to a nursery bag that can be used for mouth incubation of young. The jaws have a pair of whiskers. Eyes large and flexible. The scales are large, and the outer edges of the scales are pinkish-orange in color and fade as the fish grows.
The anal fin extends from behind the anus to the caudal peduncle, and the dorsal fin is slightly shorter than the anal fin. The body is extended and laterally compressed. Mouth superiorly lateral. Anastomosing whiskers in a pair. Head and gill cover with large plate-like skeleton, honeycombed, which can be used to breathe outside air. Dorsal and anal fins are long and located behind the rest. The pectoral fins are large. The ventral fins are located behind the pectoral fins. The caudal fin is short. The body is covered with large scales that are pink and semicircular in shape. The body is silvery white and contains a light mixture of blue, cyan, and other shimmering colors.
Extended information:
Species history of the silver dragonfish
Double-bearded bony tongue fish is mainly It is native to the Brazilian Amazon and was first discovered in 1929 by ichthyologist Vandelli. It was introduced to the United States in 1935 and to Japan in 1955, and was first artificially bred in 1966 by Mr. Miyata of Kobe, Japan, using hot springs at a tropical farm in Aso Nagayo, Kyushu. However, the ones on the Chinese market are still imported from South America through the U.S. transit, and very few are artificially bred. The scales of the fish are huge, pink and semicircular, and the body is a metallic silver color with a mixture of cobalt blue, blue, and cyan, which makes the fish shine. The dorsal and anal fins grow backward with a long base, the caudal fin is short, and the pectoral fins are large.
Baidu Encyclopedia-Silver Dragonfish