Fish don t sleep every day

Landlord, you are so small! People need sleep, and so do fish. Just as humans sleep in various ways, fish sleep in a variety of ways.

If you look closely at the goldfish we raise, you will find that at night, they will hide in the small rockery, aquatic plants and other dark places in the fish tank and remain motionless. This is the state of the goldfish when it sleeps. Fish do not have eyelids like humans and are able to close their eyes when sleeping.

Therefore, it is not easy to grasp their posture when sleeping. The following is a list of several fish sleep states for students, please pay attention to them. 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.

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.

Migratory fish, on the other hand, swim and sleep at the same time. For example, tuna, mackerel and chiayu swim back and forth day and night, making it difficult to figure out when they are sleeping; When is awake.

Fish don't sleep, their brains are divided into two halves, half at rest and half at work, thank you.

People sleep, let alone animals? Wish.

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.

Fish are vertebrates, need to sleep to eliminate the fatigue of the nervous system and limbs, but the fish has no eyelids, it can't close its eyes when sleeping, it sometimes sleeps in the dark, sometimes it sleeps in the sand or secreted bubbles to sleep, sometimes it swims while sleeping, all kinds of different postures, just live freely.