Since ancient times, paying attention to the combination of meat and vegetables will achieve a balanced nutrition. In the meat category, the main representative is meat, and in the meat category, fish accounts for a huge proportion, and many people like to eat fish. At present, it is known that the largest freshwater fish in China is Siniperca chuatsi, which lives in Heilongjiang and weighs up to 2,000 Jin, so it has the title of "king of freshwater fish". In the past, the number of mandarin fish was huge and the amount of eggs laid was huge. However, in recent years, the number has become less and less, and it is on the verge of extinction, which has to arouse our attention and reflection.

On the one hand, the extinction of mandarin fish is due to wanton killing. Pomfret is not only heavy, but also delicious, and it is loved by many people when it is used to make caviar. Because of this, driven by interests, more and more fishermen began to catch pomfret in large quantities, and even some young fish were spared. In the case that mandarin fish were seriously threatened and there was no management of relevant departments at that time, the number of mandarin fish decreased greatly. Satisfied people's temporary wishes, but brought endangered mandarin fish.

On the other hand, it is because of environmental pollution. In the early days of China's construction, we excessively pursued rapid economic development and paid little attention to environmental protection. Heilongjiang, the main producing area of mandarin fish, was once the development center of heavy industry in China. With the rapid development of economy, especially the rapid development of heavy industry, air pollution, soil pollution, water pollution and other environmental pollution are also closely followed, making the natural environment on which we live worse and worse. The deterioration of the environment directly led to the decrease of the number of surviving eggs of Siniperca chuatsi and the decrease of Siniperca chuatsi itself.

On the one hand, it is overfishing, on the other hand, the environment on which it depends is polluted, which makes the number of mandarin fish itself decrease and the number of offspring decrease, thus making mandarin fish go extinct step by step. Nowadays, China is paying more and more attention to environmental protection and saving endangered species. I believe that in the near future, the number of mandarin fish will definitely pick up.