Garbage fish that eat feces for a living in our country are rampant in the river, but no one wants to be delicious abroad.

With the progress of today's times, life is becoming more and more convenient, whether traveling, shopping, or eating, even without leaving home to buy foreign things, there are many foreign things into our country, are very popular, such as iPhone, imported milk powder and so on.

However, after some things enter our country, they are not popular. Take food, for example, there are great differences in food at home and abroad. Some are regarded as monsters in foreign countries, but after entering our country, they have become delicacies that everyone likes to eat. For example, crayfish is like this. Some of them are delicious food abroad, but they are reduced to garbage after entering our country. Below, I will tell you about such a kind of fish. It is like this.

This kind of fish is native to South America, and its skin is very hard. Its scientific name is "nail catfish". It is a common edible fish in American countries such as Brazil. It is often sold at fish stalls in local vegetable markets, because it has few thorns. It is in line with foreign tastes. But after it entered our country, its status plummeted, and everyone hated it. It has a loud name in our country: the street sweeper. When it comes to scavengers, many people associate it with dirt, sewers, septic tanks and so on, because in these places, except for Egyptian ponds, there are the most scavengers.

It is precisely because the street sweeper is too adaptable and has no natural enemies in our country, so it is rampant in the ponds, ditches and sewers in the south. Even some anglers who like fishing see a sweeper in a certain water, they are disgusted and will not fish here any more. In fact, the street sweeper is not useless, it is so named because it can purify the water quality. If you keep a scavenger in the fish tank, it will eat the feces and residual bait of other fish in the fish tank, and the inside of the glass of the fish tank will also be cleaned by its sucker mouth.

Why do people in South America eat street sweepers while people in our country don't? This has a lot to do with their environment. First of all, South America has its natural enemies, which will curb the number of scavengers and prevent it from flooding. Secondly, scavengers in South America grew up in clean rivers, unlike in China, where most of them live in places where sewage flows. Although there are many foodie in our country, the mouths of foodies are very picky. Basically, no one will eat this kind of garbage fish, which depends on feces for a living.

At present, there are also farmed scavengers in our country, of course, the varieties are optimized ornamental varieties, no matter from the appearance or habits, are much better-looking than the common black scavengers in the wild. But remember not to release it at will, because not only does the sweeper have no natural enemies, it is also very destructive, destroying rivers, dams, and farmland, and is an invasive species that destroys the environment.