Care of Fish
Animal Behavior
Fish

Fish that don't sleep at night?

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Wiki User
October 03, 2010 10:35PM

For starters, fish don't sleep in general. Fish go into a resting period and usually that has to do with the place the sun is in or if it is a fish in a tank, whether the lights are off or on.

Secondly, some fish move all day and night to keep away from predators and to insure water is passing over there gills. A fish will move while resting, when they do they are moving slowly and lower in the tank. If you have a few small fish they will follow each other and wake each other up. (Hardy fish are the best ones).

Lastly, fish are great pets for people who are half commited pet owners!

Treat them well

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The fish seems to be awake when sleeping but it really sleeps!Some fish are active in night so they dont need to sleep.Some fish pretends to be sleeping.

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Im not really sure but dont worry it will eventulay. Just dont keep light on it at night.

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most fish dont sleep.. maybe its dead.

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they dont need eyelids to sleep

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fleas dont sleep at night because thats when they are active and biting you.

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No there not all fish sleep but most of them dont have eyelds therefor cannot close there eyes

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Yes beta fish go to sleep the stay somewhere and they dont move dont go tapping on the glass he/she is asleep let them sleep like you need ur sleep they do to.

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Some fish have clear eyelids so it appears that their eyes are open when they sleep. Other fish simply leave their eyes open, but to answer your question, most fish do sleep.

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No! Fish need their sleep!

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Turn off the light at night. He can not sleep with it on.

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no they do not need light they need sleep.

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No - fish like to sleep, too!

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No they dont but its like they are dreaming with your eyes open!

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spiders dont really sleep at all, they have periods of less activity.

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I dont know as I sleep very well at night

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Probably but dont expect to get any sleep at night!!!

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Bettas do sleep! but usually at night. they will be at the bottom of the cage resting. Answer go to the Answer they have no eyelids

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yes scince jelly fish never sleep

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Summary: Fish do rest but their "sleep" is different than land animals. Although most fish "sleep", some are still under speculation because some animals need to move to survive, similarly to a shark. Most all fish spend time in an energy-saving state that can be called "rest", and we might even call their behavior "sleep", though it is probably different than "sleep" in most land animals. Many fish, like Bass and perch, rest on or under logs at night. Coral reef fish active in the day, hide and rest in crevices and cracks in the reef to avoid being eaten at night. The resting behavior of fish is very different from their behavior the rest of the day. Many minnows, for example, which are very active in schools during the day, scatter and remain motionless in shallow water at night. Many fish "rest" or "sleep" during the day and are active at night instead, but almost all fish sleep.

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They will sleep if you turn of lights in the tank but if you leave them on all night or at night, they may think it is still day and may not sleep. They dont really sleep, they sort of just swim to the bottom and rest. hope this helps a bit :p

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Black Moors are Goldfish. They do a thing similar to sleeping at night.

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Fish can sleep with opening eyes.