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Do aquarium fish sleep?

This question aquarists ask quite often, it is especially popular among beginners. Often this is due to the peculiarities of the daily routine of the owners of the aquarium. For example, a person needs to work at night. Naturally, at least some light, but included, and the owner often worries about their Pets. Did he disturb their sleep? Anyway, don’t worry, aquarium fish.

Immediately want say-Yes, fish sleep. But not in the ordinary human sense. If a person during sleep, the brain almost ceases to respond to the surrounding reality, then the fish just slow down the physiological processes in the body. At the same time, they respond perfectly to the slightest changes in the situation around them. Whether it is extraneous noise or light / shadow fallen on the aquarium. In principle, if fish initially will sit in an aquarium under light of, then she so and will fall asleep. And then just the opposite, it can Wake the lights off. Although, there is still a lot depends on the species of fish. What we will talk about below.

Features of aquarium fish sleep
As we have already mentioned, fish do not sleep as people. In sleep we close our eyes. And seeing a man with his eyes closed, we can safely assume that he is asleep. But, have fish there is no age, and eyes they respectively not close. Therefore, it is very difficult to determine whether the fish is sleeping or awake.

There are a number of common signs by which you can understand that your pet is resting. The fish becomes sedentary, practically does not move its fins and tail, often occupies an unnatural position of the body (for example, upside down or turns over on its back), can burrow into the ground, hide in plants or scenery. Of course, this behavior can be associated with the disease, but it is easy to check. Find a fish in an unusual position just tap on the glass near it. If she quickly reacts and moves to its normal behavior-means with your pet all in order. If he continues to behave incorrectly, then you need to look for possible reasons.

How to sleep barbs
As we have already mentioned different fish sleep in different ways. Here are some examples: barbuses during sleep hang in the water column upside down and turn pale, catfish hide in various shelters or just in the grass, goldfish can turn over belly to the top, cockerels, gourami and other labyrinthine usually lie on their sides as soon as they find support.

Swimming bladder and its effect on sleep
Unlike humans and animals, fish have a special organ-the swimming bladder. It contains air. And the fish, adjusting its amount in the bubble, can float to the surface, go to the bottom or just hang in the water column. The presence and health of the swim bladder in fish directly affects their sleep. If you do not work properly, the fish may have problems with diving or Vice versa-will fall to the bottom. What a dream.

But there are a number of fish that do not have a swim bladder initially. However, if they are kept in aquariums, the very large. This, for example, different species of sharks and rays. The shark, without moving, will simply fall to the bottom. But why couldn’t she sleep on the bottom? Like the catfish? It’s simple-her gills have the form of slits and in order to receive oxygen, the shark is forced to move all the time. Even in sleep. If she lay low, she would suffocate.

So, we found out that aquarium fish still sleep. But they do it completely different from us or animals. Fish in a dream almost do not move and sometimes occupy unnatural poses. So, seeing your favorite fish hanging upside down do not immediately panic. Can be test, and suddenly she simply sleeping?

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