Everyone is no stranger to exotic species. We often see those exotic species in our lives, such as Brazilian turtles, crayfish, etc.

Relatively speaking, these alien species will not have much impact. After all, they are just delicious ingredients in front of Chinese food culture.

It is true that we are not afraid of most alien species, but there are also some more difficult alien species, such as scavengers and water hyacinths.

These species are common and difficult to deal with, but some time ago, I heard fishing friends from Guangdong say that they had caught an "uninvited guest", which looked like an alien species.

A new alien species is suspected to have appeared in Guangdong. When fishing friends saw this fish, they were quite curious. After all, its appearance was a bit strange. Because it looked like a snake, fishing friends also affectionately called it "snake-shaped fish".

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Judging from the picture, this fish looks a bit like a snakehead fish and a loach. It is very common in our lives. Through later development, we found out that this is a fish whose scientific name is "moon snakehead".

Moon snakehead is distributed in many areas in the south. In addition to Guangdong, it is also found in Hainan, Fujian, Guangxi and other regions.

Depending on the region, people call it different names. It is commonly known as "Seven Star Fish", and is also called flower star fish, mountain grouper fish, Zhang Gong, etc.

Through these common names, everyone can also know its peculiarity, but in fact, the seven-star fish is not an invasive species, but a native species in our country. It is just that the number is relatively rare and people rarely see it.

Why do experts say that the appearance of seven-star fish is a good thing?

In fact, more than ten or twenty years ago, everyone would go to the fields or catch fish in the pond. At that time, people in the south would often catch seven-star fish.

However, this kind of fish is not very adaptable and has a relatively slow growth cycle, so it can basically only grow to three or four ounces. In addition, I have also heard old people say that if someone in the family has a wound, it will heal quickly after eating the seven-star fish.

It can also be seen from this that the seven-star fish has "miraculous effects", but the environmental problems in recent years have brought crises to the seven-star fish. Therefore, the number of seven-star fish has continued to decrease, and it is now rarely seen.

Because of this, environmental pollution in many areas has led to a decrease in its number. The appearance of the seven-star fish now seems to prove that the water quality in this area is getting better, otherwise the seven-star fish would not be able to live here.

In fact, the seven-star fish has high requirements for water quality. Even if it is kept in a water tank, it is difficult to feed it. The seven-star fish living in the wild has also become a "water quality surveyor."