美国已经捕获了5万条入侵的金鱼，包括橄榄球，网友：你吃不完两顿饭。

金鱼是许多人喜爱的观赏鱼。在水族馆里，在游泳池里，看着五颜六色的金鱼在水中游泳，你可以忘记很多烦恼。

然而，在美国明尼苏达州，当人们从湖里捡金鱼时，他们感觉非常糟糕，因为他们捡的是一个像足球一样大的可怕怪物，而不是他们心目中曾经小巧精致的美丽金鱼。

不仅在明尼苏达州，而且在美国和欧洲的所有地区，河流和水域都面临着金鱼的入侵和当地物种的巨大威胁。那么金鱼是如何入侵美国和世界的

金鱼起源于中国，由野生鲫鱼进化而来。2000多年前的《山海经》中就有记载，它叫文鱼，是一种变色鲫鱼。大约1000年前的宋朝，人们开始有选择地繁殖和繁殖，并发展了几个品种。然而，民间只允许养殖除金以外的其他颜色的品种，因为金是皇权的象征

1603年，金鱼传播到日本；1611年，金鱼被引入葡萄牙，并传播到欧洲其他地区；1850年，金鱼漂洋过海来到北美。从那以后，它在美国扩张了领土，开始了它的入侵生涯

现代基因测序表明，所有金鱼都是从中国南部的鲫鱼中驯化而来的

你可能很难想象，这种家伙不会溜走，刺多肉少，吃饭时总是给喉咙添麻烦，可以将自己变成一个美丽的精灵，拥有多彩多变的外表，看起来就像水中的神仙，从而摆脱了成为受害者的命运。金鱼真的应该感谢祖先的基因突变，这是第一条穿上彩色外衣的鲫鱼

与猪、牛和羊等通过贡献蛋白质获得成功的动物种群相比，金鱼绝对是世界上最成功的逆袭物种。通过1000多年不懈的整容手术，金鱼终于变得精致、赏心悦目，让人类甘愿被奴役，并为它们创造了舒适优雅的生活环境。它们需要做的不仅仅是在海里吃喝，还需要在海里吃喝。

不知道是由于基因还是与人类的长期接触，金鱼已经成为集群的一个物种，并显示出智能联想学习能力和社会学习能力

金鱼在不同群体中表现出不同的集体和个体行为，这可能是当地族群通过学习产生的“传统”，比如不同的进食、繁殖和逃避捕食者的行为，以适应不同的水生环境

金鱼也非常友好。除了争夺食物，金鱼在其他时间都和睦相处，很少互相伤害。雄鱼在繁殖时很少伤害雌鱼

你可能听过一个著名的谬论：金鱼只有七秒钟的记忆。实际研究表明，金鱼至少能记住3个月。敏锐的四色视觉系统也使他们能够区分主人和其他人。当主人出现时，他们会乞求食物，甚至伸手进去，他们也不会逃跑；当其他人到达时，他们会远远地躲在水下

来到美国后，金鱼更被视为珍贵的客人。目前，每年有超过2亿只用于宠物交易，其中大部分来自中国和日本

然而，金鱼也开始为自己对人类的奴役付出代价。许多人最终会厌倦它们，不得不采取某种方式将它们送走。当然，最好的选择是掉进河里放手。从溺爱各种东西到成为河流和湖泊中的垃圾鱼，金鱼的数量可想而知，它们发起了疯狂的报复行动。它们吃掉了所有能吃的东西，疯狂地生长，并将其他物种饿死；变形的肠道会使它们消化不良，产生更多的粪便和废物，污染水质；那些无需高度选择性繁殖就能繁殖的金鱼，负责扩大自己的种群，让其他鱼类羡慕不已；其他较小的生物和鱼卵也遭受了损失，不得不低头含泪进食。越来越多的金鱼也在池塘和湖泊底部的沉积物中觅食，将水中的植物连根拔起并吃掉，掠夺了水中本来就稀缺的资源，导致水质越来越差，使其他鱼类和水生生物难以生存

金鱼也有很强的适应性。虽然它们是淡水鱼，但它们可以在盐度低于17的微咸水中生存；金鱼也有非常广泛的温度适应能力。它们可以在34摄氏度到-4摄氏度的冰下生活，可以经历短暂的完全缺氧。这意味着当其他鱼类被冻死时，金鱼仍然可以在冰水中游泳，并以冰湖为荣。

根据加州水族馆的贸易报告，水族馆贸易占世界上最严重的水生入侵物种的三分之一。在美国，最著名的水生入侵动物是亚洲鲤鱼和斑马贻贝，导致人们对金鱼入侵的关注度很低。他们现在已经在美国几乎所有的河流和湖泊中定居下来。一些大金鱼已经长到足球大小，这让人感到害怕。部分网友The United States has captured 50000 invading goldfish, ranging from rugby, netizens: You can't finish two meals.

Goldfish is a favorite ornamental fish for many people. In the aquarium, in the pool, watching colorful goldfish swimming in the water, you can forget a lot of worries

However, in Minnesota, the United States, when people pick up goldfish from the lake, they feel very bad, because what they pick up is a scary monster as big as football, not the beautiful goldfish that used to be small and exquisite in their minds

Not only in Minnesota, but also in all parts of the United States and European rivers and waters are facing the invasion of goldfish and a huge threat to local species. So how did goldfish invade the United States and the world

Goldfish originated in China and evolved from wild crucian carp. It was recorded in the Book of Mountains and Seas more than 2000 years ago that it was called Wenyu, a kind of color-changing crucian carp. About 1000 years ago in the Song Dynasty, people began to selectively breed and breed, and developed several varieties. However, the folk only allowed to breed varieties of other colors except gold, because gold is the symbol of imperial power

In 1603, goldfish spread to Japan; In 1611, goldfish was introduced to Portugal and spread to other parts of Europe; In 1850, the goldfish crossed the oceans and came to North America. Since then, it has expanded its territory in the United States and began its invasion career

Modern gene sequencing shows that all goldfish are domesticated from crucian carp in southern China

It may be hard for you to imagine that this kind of guy who doesn't slip away, has more thorns and less meat, and always makes trouble for his throat when he eats, can transform himself into a beautiful spirit with colorful and changeable appearance, and looks like an immortal in the water, thus also getting rid of the fate of being a victim. Goldfish should really thank their ancestors for the gene mutation, the first crucian carp to wear a colorful coat

Compared with the animal populations that have achieved success by contributing protein, such as pigs, cattle and sheep, goldfish is definitely the most successful counter-attack species in the world. Through more than 1000 years of unremitting cosmetic surgery, goldfish has finally become exquisite and pleasing to the eye, making humans willing to be enslaved, and creating a comfortable and elegant living environment for them. What they need to do is not only eat and drink from the sea, but also eat and drink from the sea

It is unknown whether due to genes or long-term contact with humans, goldfish have become a species of clustering, and show intelligent associative learning ability and social learning ability

Goldfish show different collective and individual behaviors among different groups, which may be the "tradition" of local ethnic groups generated by learning, such as different behaviors of eating, breeding and escaping predators to adapt to different aquatic environments

Goldfish are also very friendly. In addition to fighting for food, goldfish live in harmony at other times and seldom hurt each other. Male fish seldom hurt female fish when breeding

You may have heard a famous fallacy: goldfish have only seven seconds of memory. Actual research shows that goldfish can remember for at least 3 months. The sharp four-color vision system also allows them to distinguish the master from other people. When the master appears, they will beg for food, and even reach in and they will not escape; When others arrive, they will hide far away under the water

After coming to the United States, goldfish is even more regarded as a precious guest. At present, more than 200 million are used for pet trading every year, most of them are from China and Japan

However, goldfish also began to pay the price for their enslavement to human beings. Many people will eventually get tired of them and have to take some way to send them away. The best choice is, of course, to fall into the river and let go

From doting on all kinds of things to becoming garbage fish in rivers and lakes, the drop of goldfish can be imagined, and they have launched crazy revenge actions

They eat everything they can eat, grow crazily, and starve other species to death; Deformed intestines will make them indigestion, produce more feces and waste, and pollute water quality; Those goldfish that can reproduce without highly selective breeding are responsible for expanding their own population and making other fish envy; Other smaller creatures and fish eggs also suffered, and had to bow down to eat with tears in their eyes

More and more goldfish are also foraging in the sediments at the bottom of ponds and lakes, uprooting the plants in the water and eating them, plundering the already scarce resources in the water, and causing the water quality to become worse and worse, making it difficult for other fish and aquatic organisms to survive

Goldfish also have strong adaptability. Although they are freshwater fish, they can survive in brackish water with salinity below 17; Goldfish also have a very wide temperature adaptation. They can live under the ice from 34 ℃ to - 4 ℃, and can experience a short period of complete hypoxia

This means that when other fish are frozen to death, goldfish can still swim in the ice water and be proud of the ice lake

According to the trade report of the California Aquarium, the aquarium trade accounts for one third of the world's most serious aquatic invasive species worldwide

In the United States, the most famous aquatic invasive species are Asian carp and zebra mussels, resulting in low attention to the invasion of goldfish

It is this sneaky invasion that has made the goldfish population gain a lot. They have now settled down in almost all rivers and lakes in the United States

Some big goldfish have grown to the size of a football, which makes people scared. Some netizens even said that they could not finish eating one or two meals

In 2013, Scientific American reported that scientists trawled a 45cm long, 1.9kg goldfish in Taihao Lake - have you ever seen such a large crucian carp

In 2018, Washington State spent 150000 US dollars to repair a goldfish infested lake near Spokane

In November 2020, Carver County, Minnesota, picked up more than 50000 goldfish from the local waters. In order to avoid further damage to the aquatic environment caused by goldfish, the county also spent $88000 to develop a long-term plan

In 2017, a Dutch man released 80 goldfish in the Feinendar Canal and was ordered to recapture them - this is the right posture to deal with invasive species

Munich, Germany, said that if those who released goldfish into the pond were caught, they would be fined severely

Several places in the United States have issued warnings that people should properly handle their goldfish and not release them into the wild

When the Asian carp invaded the United States, the Chinese eaters were eager to try, ready to carry forward the spirit of internationalism, and were introduced to the United States to help defeat the invaders; When the goldfish also invades, the eaters may have to stare: Sorry, I can't help you