Do fish sleep?

Answer 1

NO, not really. 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

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.
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 3

Yeah, they can but since they don't have eyelids they're eyes are open when they sleep. I used to have a betta fish and one way I could tell he was asleep was he would be very still and rest at the bottom of his fishbowl.

Answer 4

Generally, fish don't have eyelids, so they don't sleep in the sense we do, they go into a catatonic-like trance for a few hours each day.

Answer 5

yes they sleep with there eyes open my friends fish always does that

Answer 6

Yes.....and not really.



http://www.newton.dep.anl.gov/askasci/bio99/bio99047.htm

http://www.discoverymagazine.com/digger/d92dd/d9208ddb.html

http://www.petplace.com/fish/do-fish-sleep/page1.aspx

Answer 7

Yes but they have no eyelids so they look like they're awake.

Answer 8

yes

Answer 9

yes

Answer 10

Yes, but they have no eyelids so u can never tell.