I'm afraid the only fish that can survive such a drought is African lungfish. The swim bladder of lungfish has a special opening in the pharynx that communicates with the esophagus. The swim bladder is subdivided into many smaller airbags, and it has two swim bladders with a large number of thin-walled blood vessels. When blood flows through these blood vessels, it can absorb oxygen from the air of the swim bladder, so that the lungfish can breathe the air directly through its mouth. The atria and ventricles of lungfish heart are partially separated, almost forming a structure of two atria and two ventricles (ordinary fish only have one atrium and one ventricle), which can separate hypoxic blood and oxygenated blood and transport them to different parts of the body, and develop two ways to adapt to gill breathing and lung breathing, just like primitive amphibians.
The upper part is the blood circulation mode of breathing with lungs, the lower part is breathing with cheeks, and the black part is oxygen-containing blood flow. The gill atrophy of adult lung fish is serious, and it is impossible to complete breathing only by gill. Staying underwater for a long time will drown, which may be a rare drowning fish.
When rivers and ponds are about to dry up, lungfish will dig holes with their mouths and twist their bodies to expand a spherical space, and then secrete mucus to seal the caves, leaving only small holes on them for breathing. When water disappears and mucus dries up, they will be isolated from the outside world. At this time, lungfish enters a dormant state, stops breathing, and its metabolism drops to a very low level, so it can maintain the most basic vital signs by consuming its own muscle tissue. Lungfish spend the dry season, and when it comes to the next rainy season, they still have enough strength to climb to the nearby pond. It is said that this dormant state can last for up to 4 years.
The lungfish holds its head in the cave and is surrounded by a cocoon-like shell. South American lungfish can only dig holes in the mud, but can't make a mucus sheath. Australian lungfish can't breathe except through its mouth. There is only one swim bladder.
However, relying on mountains to eat mountains, local Africans want to eat fresh fish, so they will pick up hoes to dig lung fish. This small vent left on the ground exposes something underground, digging. . .
Note that there is also a small vent hole in this cocoon.
Alas, you can keep fresh in hot weather, or you should bring your own packaging. . . It's really a big live fish after opening ~ ~
Lungfish is in a state of high dormancy at room temperature, which has aroused the interest of biologists and medical scientists. If patients can go into hibernation in a critical state, they can have more time to wait for adequate treatment, which is more important for astronauts performing deep space missions. After injecting mice with substances extracted from the dormant lungfish brain, their body temperature dropped by 5%, their metabolic rate dropped by 33%, and they were prone to drowsiness. The mice stopped eating the day after receiving the injection. If the freezing function can be combined, it is indeed possible to realize one-time dormancy for several years.
Since fish can go ashore, real amphibians can't show weakness ~ ~ In the arid environment of central Australia, there are many desert frogs that can dig holes. This little guy is not big, but he can absorb a lot of water and store it between skin and muscles, so he always looks round.
A small puddle is enough, and the development time of tadpoles is relatively short. When the rainy season passes and the drought comes, it will dig a hole almost 30 cm deep, sleep in it and wait for the next rain. Its skin is like a waterproof coating, which can protect frogs from losing water and can last up to 7 years in such a harsh living environment.
Similarly, anything that can be used can't escape from the clutches of human beings. When local aborigines can't find water during a long journey, they will dig its cave and drink the water stored in it.
This little guy with big eyes looks high in water.
It is estimated that there are more than 5 million species of life on the earth, and about 1.7 million species have been named, and there are countless magical survival skills (for example, a large number of gills have a special organ that allows them to breathe air directly, and they will not die easily as long as they are not dry after leaving water); It is difficult for related majors to know all kinds of animals, especially animals in life, which brings space for using these characteristics to perform or even deceive people (for example, in my last answer, I used the instinct of animals to play dead to perform the super power of hypnotizing animals).
However, the sleeping skills of lungfish are really against the sky, and more effective scams can be designed.
1. Daxian led the believers to choose a treasure trove of geomantic omen in the arid countryside and hired people to build thatched cottages with earth walls;
2. It is not particularly difficult to hide a few dormant lungfish in a pre-made adobe, and it is not particularly difficult to make a lungfish adobe after several experiments;
3. After a few days of preaching and preaching, at a certain moment, the gods suddenly possessed themselves: you are sincere, you have merits, and you have specially given a few fairy fish to keep you safe and prosperous;
4. Daxian danced excitedly, directing everyone to splash water on the wall and water it with water pipes according to the Oracle;
After 5.3: 5, the wall turned into mud and some live fish could be seen coming out. . .
6. When everyone was crying with joy and wanted to take the magic fish home, five big and three thick landlords (or homeowners) appeared: You broke my financial path and ruined my hut. Who dares to touch a fish scale? Don't talk nonsense, take the fish away, 50 thousand each, or I'll shoot you to death with a spade one by one and let you fly away with your sins. . .
Or in the cold winter, you can also use the frozen "dead" forest frog to show the miracle.
After "accidentally" picking it up outside the door, Daxian was merciful. He recited the scriptures for him for several hours in the house before slowly thawing. After the earth shook, the frozen frog came back to life and was alive and kicking. . Your merits are boundless ~ ~ exactly. . . Do you have your wallet?