do fish sleep?

Answer 1

Yes they do sleep but their eyes are open

Answer 2

It depends on the fish. First, though, we should define sleep. Unfortunately, we don’t know what sleep is. We need it, whatever it is. Fish do too. Mammals, birds, and reptiles sleep in a state characterized by profound changes in brain-wave pattern. Most fish don’t show this brain-wave change when they rest. So, fish-sleep is different. However, all fish rest in a shutdown mode and recuperate like us periodically.

Some reef-dwelling parrotfish sleep at night. A fish holes up in a crevice and envelopes itself in an odor-squelching slimy cocoon. Prowling predators can’t detect it. The fish snoozes so deeply that divers can hold it while it slumbers on.

Certain sharks (the Reef Whitetip, Tiger, and Great White Sharks) "sleep" during the day and hunt at night. Streamlined sharks, like hammerheads, normally keep moving to push oxygen-bearing water over their gills to breathe. Their fins are too flabby to perform this task. However, the organ (Central Pattern Generator) that coordinates swimming movements isn’t in the creature’s brain but rather in its spinal chord. So these fish can swim while unconscious. Maybe they sleep.

Herring, minnows, and tuna sleep at night. Catfish, bass, and perch sleep under a log or riverbank during the day.

By the way, fish don’t close their eyes when they sleep. They lack eyelids.

Answer 3

there is a book by a similar title....
When Do Fish Sleep? And Other Imponderables of Everyday Life
by David Feldman

Answer 4

I believe that fish, along with other aquatic creatures, sleep using only one half of their brains. One side sleeps while the other side stays alert for signs of danger, & then they swap over, & the other side sleeps etc.

Answer 5

I'm afraid you are all wrong,if a fish slept it would drown they rest at the bottom of the river or were ever it is and then keeps on swimming

Answer 6

yes they do. the fish maybe seen swimming around to breathe because they have gills. the fish swim slowly when they are asleep, some hide behind the stones.

Answer 7

some tropical fish sleep but dont move with their eyes open

Answer 8

every animal sleeps, yes fish sleep, they just happen to do it with their eyes open :P

Answer 9

yes they do sleep.fish can't close their eyes though.if your fish has a pale color and isnt moving very much then they are most likely sleeping.

cheers

Answer 10

Yes. But they sleep with their eyes open and their fins flippin'. Ofcourse they have to do that to take in oxygen.