Arowana was first discovered in 1829. In the Amazon basin of South America, arowana is a large tropical freshwater fish, belonging to the family Osteoglossidae. Osteoglossosaurus is an ancient species, which existed more than 300 million years ago, even earlier than the Carboniferous dinosaurs. Because of its majestic demeanor, long beard and metallic scales, it resembles the dragon in China mythology, so it is commonly known as arowana. Arowana is mainly distributed in Asia, South America, Australia and Africa.

1980, Asian arowana was listed as an endangered species, and fishing in its habitat was strictly prohibited. Raising Asian arowana has become a personal luxury. With the 1989 Washington convention starting the export quota of Indonesian arowana, arowana has become an ornamental fish and gradually entered the market.

Arowana is divided into red arowana, arowana, arowana, arowana, black arowana and other arowana (including elephant fish, spotted arowana and Nile arowana) according to the color of scales.

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As early as the paleocarboniferous. The discovery of this fish began at 1829, in the Amazon basin of South America, and was named by American ichthyologist Dr. Vandell. 1933, a French ichthyologist, Dr. Belugalan, discovered red arowana in Saigon, Vietnam.

1966, French ichthyologists Bran and Doberton discovered another kind of arowana in Phnom Penh. Later, experts and scholars from some countries discovered other arowana species in Vietnam, Malaysia Peninsula, Sumatra, Bangka Island, Borneo and Thailand, so they divided arowana into arowana, orange arowana, arowana, white arowana, arowana and arowana. The real introduction of aquarium as ornamental fish began in the United States in the late 1950s, and it was not until 1980s that it gradually became popular all over the world.

Arowana's whole body glows with blue light, and the round scales glow pink after being irradiated by light, and each fin also presents various colors. Different arowana have different colors. For example, the young red dragon fish in Southeast Asia has small red scales and white in the red. In adulthood, the edge of gill cover and gill tongue are crimson, and the scales are shining. The scales of Huang Jinlong, Bai Jinlong and Qinglong are golden yellow, white gold and cyan respectively, and the ones with purple spots are the most precious. The main feature of this family arowana is that its swim bladder is reticulate and there are often organs on its gills.

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People's Network-Arowana with a value of 65,438+10,000 was steamed and eaten? Experts say it's only worth 8 thousand