With the development of China's economy, China's foreign exchange has become more and more common, and with it, there are more and more exotic species in China. Some exotic species entered China unintentionally with human beings. For example, the seeds of some plants will be attached to human clothes, then become invasive species, or come to China with human means of transportation. Others were introduced by China intentionally, and some of these introduced species caused great harm and became invasive species, such as Ampullaria gigas. At first, people introduced it as a kind of cultured aquatic products, but in the end, it was found that it contained a lot of parasites, so it was forbidden to breed and sell, but Ampullaria gigas began to flood in the wild in China.

But not every alien species will have a great negative impact. There are many alien species that are not harmful, but have many benefits. For example, the mosquito-eating fish is such an imported species. It is very small and basically has no edible value, but it can devour mosquito larvae, so it has been introduced by countries all over the world. In addition, a lot of fish have been introduced to China, which is a good thing for foodies in China to satisfy their appetite. This kind of fish to be introduced today is found in the Yellow River basin, which looks strange, but experts say it is a good thing that this kind of fish appears in the Yellow River.

This kind of fish looks a little strange, unlike native fish. It has a reddish brown longitudinal pattern along the side line, like a rainbow. The fish is about 31 cm long, with dark green or brown back and fins with snowflake-like spots. Many fishermen have never seen this kind of fish. Later, they asked experts in this field to know that this kind of fish is called rainbow trout, which is an "alien" and originated from the United States.

rainbow trout is one of the most precious fish in the world. It tastes very good, with tender meat, no spines, no fishy smell, easy to cook and extremely delicious. It tastes like chicken and is rich in nutrition. It is known as a treasure among fish. In the international market, the price of rainbow trout is also very expensive, which is one of the reasons why experts say that this is a happy event. The price of rainbow trout is not low. It is a good thing that rainbow trout appears in the Yellow River basin, because the living conditions of rainbow trout are very harsh, and it can't survive in areas with poor water quality. The appearance of rainbow trout in the Yellow River naturally means that the water quality of the Yellow River has improved, which is of course a good thing.

rainbow trout is a very friendly exotic species. Its character is mild, and it will not cause great harm to local fish. Moreover, it has high requirements for water quality, so it will naturally not be flooded. On the contrary, it can be regarded as a water quality tester. If rainbow trout appears in any water area, it basically proves that the water quality in that area is very good, so for many places. The arrival of rainbow trout is naturally very popular, and experienced fishermen are even more delighted with the arrival of rainbow trout. If you can catch more of these fish a day, you can make a lot of money.