With the increasingly frequent and close economic and cultural exchanges between countries and regions, an ecological war without gunpowder smoke is quietly starting all over the world, and the ecological disasters caused by it are seriously threatening the economic development of countries around the world and the global ecological security. However, there are also some cases, such as some species that have been flooded abroad, and their fate has been changed after they arrived in China. Let's take a look at the top 111 exotic species. Invade our country? What do you like best now that you are being eaten by artificial farming?

1. African bullfrog

African bullfrog, referred to as African bullfrog for short, is huge, weighing up to 2 kilograms, and generally more than 21 centimeters in length. The male is larger than the female. Their prey includes insects, birds, small reptiles, amphibians, rodents, etc., and even cannibalism. African bullfrog is widely distributed in Africa and brought to European and American countries.

2. Tilapia

Tilapia, commonly known as African crucian carp, is native to Lake Tanganyika in Africa. It looks like crucian carp with spiny fins and looks like mandarin fish. It belongs to euryhaline fish and can survive in both seawater and fresh water. It has strong adaptability to low oxygen environment, generally inhabiting the bottom of water, and usually inhabiting the water layer with the change of water temperature or fish size. It has excellent adaptability and strong fecundity, large food intake and rapid growth, especially in the juvenile stage. The meat of tilapia is delicious and tender. Whether it is braised or boiled, it tastes good. Now the market price of tilapia cultured artificially is more expensive than that of crucian carp and carp.

3. Crayfish

Crayfish was introduced from Japan in the 1931s and 1941s, and Japan introduced from the United States earlier. Because of its omnivorousness, fast growth and strong adaptability, crayfish has formed an absolute competitive advantage in the local ecological environment. Its feeding range includes aquatic plants, algae, aquatic insects, animal carcasses, etc. When food is scarce, crayfish also kill each other. Crawfish has a wide adaptability and a wide suitable growth temperature, and can grow and develop normally when the water temperature is 11-31℃. In China, crayfish are made into a variety of delicacies because of their larger size, more meat and delicious meat than other freshwater shrimps, which are widely welcomed, and the prices of artificially cultured crayfish are expensive.

4. African giant snails

African giant snails are medium and large terrestrial snails. The adult shell length is usually 7-8 cm, and the largest can grow to more than 21 cm. Nocturnal, omnivorous, mostly active in humid environment, like to haunt in rain and at night. The food includes crops, trees, fruit trees, vegetables, flowers and other plants. When hungry, they also eat paper and companions' corpses, and even eat and digest cement to supplement calcium, which harms more than 511 crops. In Florida, the African snail will cause a loss of $11 million a year. The meat of African giant snails is elastic, tough and tender, which is very popular among people. In the past, there were people who specially raised African giant snails in southern China. However, it was later reported that African giant snails contained parasites and were slowly abandoned by the market. Now they are listed in the List of Alien Invasive Species in China by China, which is a second-class quarantine pest in China.

5. Rainbow trout

Rainbow trout is native to the Pacific coast of North America and kamchatka peninsula, and mostly inhabits cold and clear upstream sources, streams, small rivers to large rivers or lakes. Its meat is tender, delicious and odorless, especially small bone spurs, and it is not necessary to scrape scales when eating. Hongzun fish is rich in unsaturated fatty acids and amino acids, which is beneficial to human body's absorption and nutritional balance. Red fresh meat is sweet and delicious, and can be called "the king of fish products". Whether eaten raw or smoked, it tastes better, so it is very popular in the market. Rainbow trout eggs, which are as big as soybeans and rich in highly unsaturated fatty acids and egg proteins, are world-renowned high-grade nutritious foods. Rainbow trout culture in China first started in 1959, and currently rainbow trout on the market mainly rely on artificial culture.

6. Brazilian red-eared turtle

Brazilian red-eared turtle, also known as Brazilian turtle and red-eared turtle, is not native to Brazil, but lives in the Mississippi River and Rio Grande River basins in North America. It was introduced to China in the 1981s. Brazilian turtle was originally introduced for the purpose of eating just like Pomacea canaliculata, and it has the characteristics of large individual, wide appetite, strong adaptability, fast growth and reproduction, high yield, strong disease resistance and high economic benefits. Because the Brazilian tortoise has strong overall reproductive ability and high survival rate, and its foraging and grabbing ability is stronger than that of any native turtle species in China, if it is released, it will greatly erode the ecological resources because there are basically no natural enemies and a large number.

7. Pomacea canaliculata

Pomacea canaliculata is a mollusk of the genus Ampullaria, which is very similar to a snail in appearance, with large size, wide feeding habits, strong adaptability, rapid growth and reproduction, and high yield. Eating snail with insufficient heating may cause infection of Angiostrongylus cantonensis and other parasites in human body. Introduced to China in 1981, it has been included in the first batch of alien invasive species in China. Its meat is edible, but its taste is not good. In addition, it is also the feed for some precious aquatic animals. Pomacea canaliculata has large size, wide feeding habits, strong adaptability, rapid growth and reproduction, and high yield, and is cultivated all over China.

8, bamboo shell fish

The bamboo shell fish is slightly elongated and stout, with a cylindrical front and a slightly flat back, and a flat and large head, much like the sand pond in China, except that it is much larger than the sand pond snakehead, mainly distributed in Southeast Asia such as Thailand, Malaysia, the Philippines, Indonesia, etc. Taiwan Province introduced it from Khmer in 1975, because it is a tropical fish species.

9. Guinea fowl

Guinea fowl, also known as Pearl fowl, is native to Guinea on the west coast of the African continent. Its meat is tender and delicious, with high protein and low fat. As wild poultry, it has gradually become a new species of meat poultry in some countries after domestication and breeding. Guinea fowl was first introduced from the Soviet Union in China in 1956 and successfully raised. Large-scale breeding began in 1992, and after continuous exploration and experience summary, the breeding technology began to mature in 2112.

11. Crocodile eel

Crocodile eel can grow up to more than 3 meters at most, with long upper and lower jaws, deep mouth crack and sharp teeth. It is a large fierce fish, mainly living in pure fresh water, occasionally entering salty fresh water, and likes to live alone. It is only found in the east of North America, Central America and Cuba, and it is extremely destructive. If it is placed in natural waters, it will bring extinction to the local water ecosystem. A crocodilian eel with a size of more than 11 cm raised by humans can be sold for tens of yuan. Adult crocodilian eel is delicious and firm in meat. The main reason for flooding abroad is that people never eat it. Netizens lamented that they lack a China chef. ?