Each region has a complete biological chain system, which is relatively stable, but once it is broken, the impact on the entire biological chain is very large. There are already many such examples, such as a yellow flower in Canada, which is flooded in China, and has a role in inhibiting the growth of many native plants, although it has begun to be treated everywhere, but looking at the Yellow Flower in Canada everywhere, it always feels that the effect is not great.
This influence exists not only in the plant kingdom, but also in the animal kingdom. Today we will talk about one such animal, known as the "freshwater tiger", which was introduced as an ornamental species, but now it has become a "hazard".
This is the pencil fish, its official name is small shield snakehead, when the adult fish has a wide black longitudinal band on the side of the body, when the juvenile fish has two black longitudinal bands on the side of the body to show orange, when it is stationary in the water like a pencil suspended in the water, there is a pencil fish. Native to Southeast Asia and mainly distributed in Vietnam, India, Thailand and other countries, this fish family is a very fierce fish, almost all the fish, shrimp, insects in the water are its food, even frogs and water birds can be its food. The characteristics of pencil fish are also very obvious, growing fast, and can quickly dominate a body of water.
So it also has the title of "tiger in the water", which is not exaggerated for pencil fish. Its largest body size can exceed one meter and its weight can reach more than 20 kilograms. Pencil fish are the most aggressive when spawning and protecting juveniles, and there have even been reports of pencil fish attacks injuries because people are too close to juveniles and eggs. However, the juvenile fish of this fish is very ornamental because the body color is very rich, china also introduced aquaculture from Thailand in 1986, as an ornamental fish, there is still a certain popularity in the market, the development to this day there are still some people like to take it as an ornamental fish to breed.
There is also a more important aspect of the introduction of pencil fish, that is, the meat of pencil fish is tender and white, the meat production is high, or a high-grade edible freshwater fish, and many fishermen in the south have also obtained certain benefits by breeding this fish. However, the pencil fish eats a very large amount and grows very fast, and after being farmed as an ornamental fish, the adult fish has no beautiful color of the juvenile fish, and it looks like an ordinary big fish with a gray protrusion. And those who come to breed as ornamental fish, almost all of them will release the fish that are large and ugly as a release fish, but this way has become a "hazard".
There are reports that in China's Guangdong region, some waters have appeared pencil fish, this fish for the local water biological chain can be described as a fatal blow, all native fish have become its food, almost its waters other fish are difficult to find, and in the spawning season, there is a danger of attacking humans, obviously has become a potential "hazard". Don't know if you've ever seen this "freshwater tiger"? Do you find it aggressive? We look forward to your message and forwarding.