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Fish swim in the water, birds fly in the sky, this is our basic cognition, but just like there are ostriches and other birds, in fact, they can't fly, not all fish will stay in the water all the time, they all say that the fish will die without water, but some fish, not only will not die if they leave the water, but even if they have been in the water, they will be "drowned".
Water is a must-have for most creatures, if people don't drink water for a week, they can't support it, birds, animals and even plants can't leave the water for a long time, but in Africa, there is a kind of fish that can not eat or drink, and does not live in the water for 5 years without dying, this fish is also called "zombie fish", "undead fish" and so on.
<> undead fish native to Africa are dried on the shore for three years, but they are still vigorous.
This fish that has been out of water for a long time and can still live is called lungfish, its origin is Africa, Oceania and the equatorial region of South America, only in the tropics, this species can survive, probably because it has lived in hot areas for a long time, often facing the depletion of water resources, this fish will evolve such a strong drought tolerance and vitality.
The general fish are breathing with the gills, but the lungfish can also use the swim bladder instead of the lungs, in the dry period, they burrow into the mud for summer sleep, at this time, they will use the lungs to breathe, and the lungfish on the land for a very long time, the lungfish can sleep without eating or drinking for three to five years, even if it is dried into fish, as long as the river water comes again, they can live vigorously.
<> lungfish do not die after being out of the water for a long time, but they may be "drowned" if they are in the water for too long
There are two reasons why African lungfish can live in the mud for so long, one is because their swim bladder is very developed, very similar to the lungs of land creatures, and can use the swim bladder to absorb oxygen and expel carbon dioxide when there is a lack of oxygen, and can easily spend up to 6 months of dry season on shore.
The second is because after it enters the mud, in order to prevent it from drying out, it will secrete special mucus from ** to wrap the whole body to form a waterproof layer, leaving only a small hole to breathe. He uses his muscle and fat as nutrients to survive and reduces his metabolic rate to one-sixtieth of his original level, which is about 2% less than normal.
It is precisely because of these two reasons that the lungfish never have to worry about dying out because of the drought, but this is a fish that may be drowned, because of the development of the swim bladder, so that the gills of the lungfish can not fully meet the respiratory function, and must rely on the swim bladder to complete the breathing, so the lungfish can not stay in the water for a long time, and every once in a while need to ventilate, otherwise there is a risk of being "drowned".
Barramundi is therefore known as the world's most "strange" fish, after all, this kind of water can survive without obstacles, but if you live in the water for a long time, it is possible to die of fish, it is really a special case among fish, but barramundi is already a species with a history of more than 300 million years by virtue of its tenacious life ability, what do you think about this?
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This is because its swim bladder is too well developed, which causes the gills to not breathe well. So it can drown in the water.
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