Why do goldfish sleep with their eyes open?

First of all, goldfish, like humans, are vertebrates, and need to sleep to eliminate the fatigue of the nervous system and limbs, but the goldfish sleep with their eyes open is determined by the body structure of the goldfish. Goldfish do not have eyelids, which are the part of the human eye on the face, so they cannot sleep with their eyes closed like humans, and can only sleep with their eyes open; At the same time, I can't blink and close my eyes like humans, isn't there a lot of regrets!!

Secondly, goldfish are not "honest" when they sleep (my mother often says this about me, a dialect, and I have ADHD when I sleep), but when we see goldfish in the fish tank with their eyes open and motionless, and their gills are open and closed, it means that they have fallen asleep. Most goldfish will remain in a quiet state in the water when they sleep; However, some goldfish sleep in the dark, some sleep in the sand, or sleep in secreted bubbles, and sometimes even swim while sleeping, in a variety of different positions, their bodies are in a relaxed state. In fact, this is the same as human sleeping, to create an atmosphere, to have a comfortable bed, before going to bed to turn off the lights, bring earplugs, to avoid noise, but the goldfish is to avoid other fish attacks, but also to be comfortable.

Finally, Are goldfish the same as humans? Have a regular schedule, what time do you go to bed? What time do you wake up?

How many hours of sleep? --Goldfish do not have a fixed schedule, this depends on the sleeping environment of the goldfish, for example, domestic goldfish suddenly turn on the light, touch the fish tank, wild goldfish will wake up when they encounter natural enemies, so it is not fixed. But I also learned that goldfish can also develop a habit of work and rest, of course, limited to domesticated goldfish; To have a professional fish tank light, by turning on the lights for the goldfish during the day and turning off the lights at night, so that the goldfish know that it is time to go to bed at night, and slowly can help the goldfish form a healthy work and rest habits.

Goldfish sleep with their eyes open because they don't have eyelids, and not only that, but fish don't have eyelids, so fish sleep with their eyes open. In addition, because there are no eyelids, so goldfish and other fish are unable to blink and close their eyes, sometimes goldfish in the fish tank with their eyes open and motionless, in fact, they may be sleeping, at this time we can observe their gills are open and closed, which means that they have fallen asleep, and some fish can even swim while sleeping. Now you know the secret of goldfish sleeping with their eyes open.

How goldfish sleep.

1. Sleep in the dark.

For example, some goldfish like to sleep in the dark, because they can avoid the attack of other fish in the dark, and it is particularly quiet and not noisy, so we can put some small rockeries or a variety of aquatic plants in the fish tank when raising goldfish, so they can create a comfortable sleeping environment for them.

2. Sleep covered in bubbles.

Some goldfish like to secrete a lot of bubbles to wrap their whole body, so that they will feel more secure and will not be attacked by other goldfish, when they are wrapped in bubbles, sometimes they will swim slowly with the water, which will bring them a sense of comfort. Goldfish sleeping is indeed very different, after all, some fish can swim while sleeping, you can watch goldfish sleeping on the Internet ** is very interesting, goldfish can be said to be one of the top ten most cute fish.

3. Sleep in the sand.

In addition, some goldfish like to sleep in the sand, which is also quieter and can avoid the attacks of other fish, why don't these goldfish hide in the shadow? Because different goldfish have different habits, so the way they sleep is also strange, at this time some people can't help but sigh that goldfish are too difficult to raise, in fact, mastering the living habits of goldfish, raising goldfish is not a difficult thing.

Why do goldfish sleep with their eyes open? Because of the goldfish's biological clock, her sleep is this habit, and his eyes must be soaked in the water to be more comfortable.

Fish do not have eyelids, so they can only keep their eyes open at all times, even when sleeping. It is worth mentioning that different fish have different sleeping habits, and some are used to hiding in dark places, such as behind aquatic plants or rocks. Some will bury themselves in the sand to avoid being attacked while sleeping.

The reason why fish sleep with their eyes open is because they have no eyelids, so they can't close their eyes, which is why many people mistakenly think that fish don't sleep. Different fish also have different sleeping styles, some will sleep in the sand, and some will sleep while swimming, which is quite interesting.

Fish do not have eyelids, so when it sleeps, it cannot close its eyes.

We often see fish standing still in the water, and the gills are moving in flashes, which is exactly what the fish are sleeping. If you wake it up, it will swim in the water again.

Why do goldfish sleep with their eyes open? Yes, fish is like that, very special, he is very adapted to his underwater life, so it does not affect his rest, sleep and activities.

Fish don't have real eyelids, so they can't close their eyes when they're asleep or awake, even when they're dead.

Because a goldfish has no eyelids and lives in water all year round, its eyes will not close.

Because goldfish, including other fish, don't have eyelids, they don't need to live in water!

Many animals are like this, some nocturnal animals also sleep with their eyes normally, because they don't need to close their eyes, and it doesn't matter to them if they close their eyes, they just need to fall asleep, and then they don't need to open their eyes, they have to close their eyes if they don't close. For example, owls at night are hanging to sleep, but they can also open their eyes.

Why do goldfish sleep with their eyes open? The goldfish never closes his eyes, his eyes are always open.

It's not just goldfish, they sleep with their eyes open, and most of them are like this. Because fish don't have eyelids.

Vertebrates all sleep, and fish are vertebrates and also need to sleep to eliminate fatigue on the nervous system and limbs, however, fish does not have eyelids (eyelids) so when it sleeps, it cannot close its eyes. We often see a fish standing still in the water, its gills flickering and moving, which is exactly what the fish is sleeping, and if you wake it up, it will swim in the water again.

Goldfish belong to vertebrates, use sleep to eliminate fatigue, fish have no eyelids, can not close their eyes when sleeping, are open, sometimes sleep while swimming while sleeping, unlike other animals, need to lie down, it only needs to be still in the water or slightly swinging.

01 Fish do not have eyelids, so they do not blink or close their eyes, so they can only sleep with their eyes open. Sometimes you see it standing still in the water, just its cheeks open and closed, then it's sleeping.

So how do goldfish generally sleep?

Situation 1: Sleep in the dark.

If you look closely at the goldfish we raise, you will find that at night, they will hide in the dark places such as small rockeries and aquatic plants in the fish tank and remain motionless. This is the state of the goldfish when it sleeps.

Situation 2: Drill in the sand.

Some fish such as flowers, sea pigfish; When night comes, they will burrow into the sand and sleep motionless, which is quiet and effective against predators.

Situation 3: Secretion of bubbles.

Some fish, such as split-billfish and South Sea parrotfish, will secrete a special gelatinous substance in its body, and when they want to sleep, they blow a big bubble like a child, and the gelatinous bubble hardens when exposed to water, and then they get into the bubble, leaving only a small hole in the mouth, just like in a sleeping bag.

Most of the fish that live in freshwater sleep behind rocks and in the dark of aquatic plants. Like carp and crucian carp burrow into aquatic weeds, while mullet and snapper sleep behind rocks. Situation 4: Swim while sleeping.

Migratory fish, on the other hand, swim and sleep at the same time. They swim all the time because they have to constantly spit out water to keep breathing, such as sharks, tuna, mackerel and chia, swimming back and forth day and night, making it difficult to figure out when they are sleeping; When is awake.

Goldfish sleep with their eyes open, which is due to the biological structure of the goldfish, which itself does not have eyelids (eyelids), which also causes the goldfish to not blink and close their eyes. Since sleeping with the eyes open can easily be confused with death for a goldfish, the owner can tell if it is dead by observing the goldfish's gills.

Goldfish sleep with their eyes open, which is due to the biological structure of the goldfish, which itself does not have eyelids (eyelids), which also causes the goldfish to not blink and close their eyes.

The eye structure of goldfish is similar to that of human eyes, except that the lens of the fish's eyes is spherical while that of humans is oblate, and goldfish have no eyelids, which makes them unable to close their eyes.

Since the goldfish does not close its eyes and does not move when sleeping, it is similar to the state of death, so the owner must learn to distinguish whether the goldfish is sleeping or dead, which can be judged by observing the gills of the goldfish, and when the goldfish gills are agitating, it proves that the goldfish is still alive.

Fish need sleep just like people.

If you look closely, you will find that at night, they will hide in the dark places such as small hand rockeries and aquatic plants in the fish tank and remain motionless.

The state of the fish while sleeping.

According to the China Science and Technology Press-Popular Science China Network

Most fish sleep with their eyes open because they generally have no eyelids (some fish have eyelids). Mainly some cartilaginous fish), the ruler does not show the sleep characteristics of rapid eye movement like humans, so it is not easy to detect that it is sleeping.

Some of them sleep during the day, so you can still see fish swimming at night, which makes people mistakenly think that they are not resting.

In addition, some fish still gently shake their tail fin while sleeping, maintaining their balance, and appear to be still swimming.