The "cannibal" originated in Southeast Asia can weigh up to 600 Jin. Why didn't it grow to 20 Jin when invading China?

The world's largest freshwater fish, the "cannibal" catfish in Southeast Asia, is actually the boss of freshwater fish. Its existence makes people love and hate. The scientific name of this China is "giant toothless bustard", also known as Mekong giant catfish. Its distribution is relatively narrow, and it only lives in rivers in Southeast Asia, especially the Mekong River. Because of its huge size, the Mekong giant catfish can basically eat everything in its diet. When it is a larva, it will catch some insects, frogs and so on, but when it is mature, it will even eat people.

This is a special species, but due to some factors such as smuggling, it was released into the rivers of China. Giant catfish in Mekong River is suspected to be found in Wujiang River, Pearl River and other rivers in China. Over the years, many fishermen have caught many strange fish, among which the Mekong giant catfish is just the tip of the iceberg. Because the Mekong giant catfish has a big appetite and good genes, it is really at the top of the food chain in a highly adaptable environment. However, in populous China, the Mekong giant catfish has been eclipsed, and has not grown to 20 kilograms since the invasion of China.

It's wonderful to see 50 to 60 kilograms of big fish now. Overfishing and environmental pollution have led to a great decrease in fish in the river. The Mekong giant catfish seems to have come to the wrong place. Besides, catfish don't have many bones, so they are very popular at people's tables. If it can breed in large quantities, it won't have too many negative effects.

Nowadays, due to artificial damming, water pollution and human fishing, the living environment of this large fish has gradually disappeared and its own living environment is limited. Now, in the face of such a situation, the number of giant catfish in Mekong River has been greatly reduced. Now the Mekong giant catfish has long been listed as an extremely endangered species, and international organizations are also trying to save them.