Do Goldfish Sleep?

Do Goldfish Sleep?
Do Goldfish Sleep?


Goldfish do indeed sleep, but not in the same manner as us. Since goldfish don’t have eyelids, they don’t close their eyes at night to get to sleep. A healthy goldfish has to sleep all night long since it’s essential to their wellbeing. Like people, goldfish get tired and like to sleep well at night. Only in a completely dark environment without any lights on above the tank or elsewhere in the environment can goldfish fall asleep. Because of this, it’s critical to offer your goldfish several hours of darkness each day. By giving them darkness at the same time as you go to bed, you may make this simple.

How Do Goldfish Get to Sleep?

Neither do goldfish lie down to sleep nor do they have a special bed for it. Instead, goldfish stop moving and tend to cluster in a single area of the aquarium. To maintain stability in a particular position, their gills and fins will both move. A goldfish may choose to rest close to the water’s surface, beneath a piece of furniture, or even on the ground. They will have a head-to-body ratio.

Although the state of rest that goldfish enter at night is referred regarded as sleep, the brainwaves of sleeping goldfish remain unchanged.

When do goldfish go to sleep?

Goldfish will start preparing for sleep as the tank dims and the surrounding area becomes quiet, which typically happens at night. In the wild, goldfish have a kind of internal clock that tells them when it’s time to sleep when there is darkness, moonlight, and a drop in temperature. Your goldfish must have total quiet and darkness in captivity in order to sleep soundly. To enjoy their activities when you are awake, goldfish should ideally sleep when you do. But altering a goldfish’s sleep cycle could mess with its biological clock.

You may also like to read Goldfish Swim Bladder Disease: Symptoms, Treatment & Prevention

Providing a Day and Night Cycle for Your Goldfish

Your goldfish will develop a regular sleeping routine if you turn the lights out at the same time every night. The greatest approach to make sure your goldfish is getting enough sleep is in this way.

The majority of aquarium lights have remote controls that can be used to set timers. This is useful for keepers who might forget to turn on the tank’s light due to busyness. The dawn and dusk settings found on the majority of automatic lights are a fantastic approach to expose your goldfish to the cycles of natural light. If there isn’t a dimming option available, you should normally turn the light off while there is still light in the area.

Goldfish Show Symptoms Of Sleep Deprivation

Your goldfish may display symptoms of sleep deprivation and higher levels of stress if they are not given the recommended number of hours for good sleep. Goldfish also require sleep in order to replenish their energy and keep their immune systems operating normally. Goldfish must have at least 8 to 12 hours of total darkness to sleep; if they don’t, their health will gradually deteriorate.

Are Goldfish Sleeping or Bottom-Sitting?

If a goldfish is bottom seated, many people assume they are sleeping. Despite appearing similar, both have distinct meanings. Because of illnesses, stress, small tank syndrome, or unfavorable water conditions, goldfish will bottom sit. Lethargy and tightly clamped fins are typical side effects of bottom-sitting.

You must test the water and look for disease symptoms in order to identify the issue’s root cause. The goldfish may be too small if it cannot swim six times its body length across the aquarium. When it is light outside, goldfish won’t sleep during the day. If your goldfish are bottom-sitting all day, there may be additional problems that are stressing them out.

Decreased Temperature

Your goldfish will sleep longer as the temperature of the surrounding area drops. This is a result of the decreased daylight hours throughout the winter. If their water is kept below average for an extended amount of time, your goldfish may naturally desire to go to bed early. They may become less active when the temperature drops, which may simulate how they would sleep.


The benefits of sleeping are equally fascinating to owners of goldfish. In order to help your goldfish get some rest at night, you should make it a priority to turn off the light in their tank. A goldfish’s daily cycle includes sleeping, so you should aim to replicate the quantity of light and darkness they encounter in the natural.

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