Previously, the continuous high temperature drought caused many rivers to dry up, and many fish corpses were left on the exposed riverbed. It makes people worry that even if the high temperature passes in the future, will the ecology of the river return to its former appearance?

Previously, the continuous high temperature drought caused many rivers to dry up, and many fish corpses were left on the exposed riverbed. It can't help but worry that even if the high temperature in is over, will the ecological in the river return to its former appearance .

Dry fish skeleton on the ground at the bottom of the lake

However, due to the permeability of the river, as long as the fish upstream are still there, some can be sent and artificial stockings can be used to restore vitality.

It is worth mentioning that fish sometimes appear inexplicably in some small ponds that are not connected to rivers. Therefore, there is also a common saying among the people: "Thousand-year-old grass seeds ,000-year-old fish roe " . So, why are there fish in ponds under natural environment? Where did these fish come from?

Little fish in a clear pond, which is leisurely and contented,

Where did the fish come from?

Everyone knows that there were many small ponds in the countryside in the past, and even after several days of heavy rain, low-lying places could form a "small pond" by themselves. The pond itself is nothing strange, , but when creatures appear in it, everything becomes strange .

You should know that these small ponds are often not connected to the waters of the outside world, so relatively speaking, is still very high in . In this case, the fish appear out of thin air is like a "outsider", which shocks people. Next, let’s talk about where these fish came from.

Could it be that it was flying over?

First of all, according to the meaning of the sentence "thousand-year-old grass seeds and ten thousand-year-old fish roe", these fish that appear in closed ponds are all developed from fish eggs. The question is, if this pond has never raised fish, there is no possibility of "remaining fish eggs", so where did the fish eggs come from?

In fact, as long as the fish eggs are strong enough, can indeed set up camp at a new location while riding. The first is that is wrapped in by wind and rain. When a storm occurs, some fish eggs may be wrapped in small ponds nearby. Of course, this conspiracy requires distance, and is generally closer to .

Some fish eggs are much stronger than we imagined

Secondly, animals act as " SF courier" . Everyone knows that many plants in nature will stick their seeds to the animal's fur, or stuff them into their food , so that they can follow the animals and arrive in other places to take root.

For example, there is such a complex symbiotic relationship between camels and camels and camels thorns . They are interdependent and become the "brothers and brothers" in the vast desert.

Camel thorns are the only forage that camels can eat

The main force that helps fish eggs migrate and spread is water bird . Whether eating eggs or fish eggs rely on "stickiness" to stick to their feathers , it is conducive to long-distance transmission.

You may find it unbelievable to see this. The fish eggs were eaten by water birds, but can they still be hatched?

Waterbird, which is responsible for the mission of "hooking up", is indeed the case, because in 2020, a research team in the United States conducted relevant experiments. They found the eggs in the mallard excrement in the experiment, and successfully hatched some of the eggs in .

Although according to the experimental comparison, there are very few fish eggs that can be trained in the animal's stomach and intestines and still maintain a perfect state, and only 6% of 's complete eggs can be hatched smoothly. But since this probability exists, means that the water birds can indeed add to the "fish-free pond".

Schematic diagram of wild ducks helping fish eggs spread

It is worth mentioning that since birds are rectal animals, usually pull while flying. In this case, fish is really "falling from the sky" . From a certain perspective, those fish that rely on water birds to successfully land and survive are indeed lucky.

Secondly, there is another possibility that there are rivers in higher terrain. Under the conditions, some fish or eggs will be washed out and entered the small pond downstream . In fact, this is also brought from the outside, but it is just a lack of the "intermediary" of Waterbird.

The leisurely and comfortable little fish

Of course, if there are many fish out of thin air in a larger artificial pond, in addition to considering that it is imported from outside under natural conditions, also has to release animals for humans . After all, the culture of releasing animals is still quite popular nowadays. Even many people fishing by the river will release the fish after they catch it.

To sum up, you should understand that the sudden appearance of fish in ponds under the natural environment is not because the "soil" has the ability to produce fish eggs. is related to the influence of external factors .

"Thank you for not killing me!"

It is worth mentioning that in addition to the amazing vitality of fish eggs, there are also some creatures in nature that have the ability to "appear out of thin air" . Next, let’s take a look at what’s special about these creatures.

magical "diapause period"

First of all, let's talk about the fairy shrimp , which was often reported in the past. This shrimp is called frontal worm , and is a creature of the Arthropod, Crustaceae, and Gills.

This creature has lived on Earth for a long time, and has been around for more than 200 million . Judging from its appearance, it is indeed very beautiful, and the forked part at the tail is still red.

Beautiful fairy shrimp

The appearance of fairy shrimp is often confusing, They are in large ponds and small puddles . So, do fairy shrimps also reach various closed waters through water birds?

is not necessarily the case. Maybe the fairy shrimp you see is "local native" . Why do you say so?

Schematic diagram of the growth process of fairy shrimp

Because although mature fairy shrimp only has two or three months of life, its eggs are very strong. According to scientists' observations, fairy shrimp eggs have very strong survival ability , whether it is dry, hot or cold, they can survive without any danger.

These eggs smaller than gravel can exist in the soil for many years, and the hard shells on the outside can help them resist all kinds of wind, frost, rain and snow. When the rainy season comes and the environment is suitable, the eggs of the fairy shrimp will hatch. After that, people can see beautiful shrimps swimming in the water.

According to news reports, this creature is present in many places. These small creatures, , may have come from ancient times, their eggs have been sealed by time for many years, and finally chose to meet us today.

Fairy shrimp eggs

Next, let’s talk about another organism that belongs to the class Gills and foot Three-eyed dinosaur . Unlike fairy shrimp, this creature looks even more strange in appearance, with a round carapace on its head. The scientific name of the three-eyed dinosaur is Jiapeng horseshoeworm . This guy has many nicknames, such as turtle lids, rollover cars, etc., and the names are different in different places.

Many people subconsciously think that the name of the three-eyed dinosaur is related to the dinosaur. In fact, the two are not related at all. is just that the three-eyed dinosaurs lived in the same era as the dinosaurs. According to investigations, the organism existed as early as 300 million years ago.

Growth of Jiapeng horsesworms at different stages

Like fairy shrimp, the eggs of three-eyed dinosaurs are also very strong, with a very long "diapause period" . Whenever the environment changes drastically, the female horseshoe crab will send a "biological signal" and notify its eggs not to hatch and enter and wait for . This is indeed magical. As an insect egg, the three-eyed dinosaur can understand the signal.

In addition, according to scientists' observations, the diapause period of three-eyed dinosaur eggs has been as long as more than 20 years .This makes them occasionally become "outsiders" in ponds, and even appear in small puddles.

Japong horseshoe crab egg

To sum up, all kinds of creatures in nature do have their own specialties, which is probably the magic of nature! However, what is worrying is that the "miracle" of may become less and less in the future.

is very important to protect the environment

With the development of science and technology, the pesticide usage rate of rural land has become higher and higher. In this case, many remaining pesticides in will remain in the soil, posing a threat to the organisms in .

Whether it is a three-eyed dinosaur with a diapause period or a fish egg that relies on animals to survive when encountering this toxic environment.

No matter how strong it is, it still cannot withstand human activities

In other words, although their eggs are extremely strong, does not have such strong "anti-toxic ability" . Therefore, these "unexpected surprises" are becoming less and less. The little lives that once fluttered in ponds and small puddles seem to have really disappeared with the drastic changes in the environment.

In addition to this, many creatures now face such problems, such as swallows that have nowhere to build nests, and cicada monkeys that cannot penetrate the cement ground.

Swallows who built nests on cement walls

In an environment where humans feel increasingly convenient, many creatures have encountered unprecedented survival disasters. I really hope that after several years, they will still be able to coexist with humans. After all, many creatures are already considered "living fossils".