Do fishes sleep??

Answer 1

Some fish keep very still, experiencing a quiet period (quiescence) that you might call sleep. Scuba divers often handle reef fish in the middle of the night without startling them and can even lift some species out of the water before they awaken. Tropical freshwater fish in home aquaria appear to be resting immediately after turning the lights on in a room that has been darkened for several hours. Unfortunately, fish have no eyelids so it is difficult to tell whether they are asleep or not.

Answer 2

Fish do sleep.

To demonstrate, turn off the tank and room lights so you have complete darkness for an hour or so. Then suddenly turn on the light. The fish will be asleep and kind of "zoned out" for a few minutes until they regain consciousness.

It's also easier to catch them while they're in this sleep state, because they're not conscious and can't see.

If the lights are always kept on (or if the tank lights are off but the room lights are on), they may rest but they don't sleep.

Some fish, lilke scavengers, are nocturnal and are active in the night (they usually hide and sleep during the day or sleep very little during the dark).

Answer 3

Many species of fish have periods where they are active and periods where they are not. That could be considered sleep; however, fish do not close their eyes because they have no eyelids. As well, some fish (like tuna and shark) rely on water moving constantly through their moths to breathe, so inactivity is not an option for them.

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.
There are some animals that never stop swimming, like many species of shark, however, they HAVE to keep moving to push water through their mouths in order to breathe, and they may still sleep while moving.

Answer 4

No they don't sleep they rest, they can't take a chance to sleep because of the preditors that they have, even fish in a fish tank don't sleep, they only rest on either the stones or on the gravel of the tank. I think that most probably has something to do with their short memory span.

Answer 5

Hell no! With all the stuff fish have to do, they have no time to sleep.

Answer 6

Fish don't have eyelids & so you don't really know whether they're sleeping or watching you.

Answer 7

yes fishes do sleep....

when they sleep they move around or float in the water.....

Answer 8

rose, i do not think fishes sleep cause they never close.they can sleep when their dead though!

Answer 9

yes 4 sec per a day

Answer 10

oooooooooh
i wanted to ask this Q
i just asked a friend now and she told me that they sleep but with an Open eyes...
cos they can't close their eyes like us they doasn'e have that thing we have above our eyes :(