do fish sleep?

Question

how, do they close their eyes, or no?
♥Roberta♫

Answer 1

Answer: 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,
we just don't know yet.

Answer 2

Section: Fish Sleep


It’s probable that fish do sleep in some form, whether slowing down or coming to a complete stop, whether hiding or doing it right in the open.

Slideshow Everyone needs sleep. Every night average people perform a sleep ritual: We change into pajamas, crawl into our soft comfy beds, close our eyes and enter into a restful state. Our hearts slow down, we breathe slowly and regularly, and our muscles become relaxed. Once or twice an hour we roll over, but we are no longer tuned in to our environment. We spend about 8 hours a day sleeping – that's one third of our lives.

Sleep means different things to different forms of animal life. The Saunders Comprehensive Veterinary Dictionary sums it up pretty well: A period of rest during which volition and consciousness are in partial or complete abeyance and the bodily functions partially suspended; a behavioral state marked by characteristic immobile posture and diminished but readily reversible sensitivity to external stimuli.

Answer 3

fish sleep and close their lower eyelids when they do, but the lower lids are clear so they look like their eyes are open. In their sleep, they constantly watch for predators. So they probably don't sleep very well.

Answer 4

Yes, fish sleep. No, most fish sleep with their eyes open.

Answer 5

Fish do indeed sleep. You may not tell because they are unable to close their eyes. However, when you see them at the bottom of the fishtank not moving at all, you know they're asleep.

Answer 6

Someone just asked this like 3 minutes ago. Yes, they do sleep on their waterbeds....with their eyes open, I don't think they have eyelids.

Answer 7

That's the last thing I'm thinking about as I'm devouring a breaded, juicy, fried fish filet.

Answer 8

fish have an invisible eyelid and yes they sleep when they get near the bottom

Answer 9

If they stay in one place too long ,,,,for sleeping......they would drown....they must pass water through their gills to get the oxygen they need, so they pretty much have to keep on the move...

Answer 10

No fish don't sleep they constantly have to have water moving through their gills.