Any body knows fish sleep or not?
By balabrahmam
@balabrahmam (1071)
India
10 responses
@lafavorito (2959)
• Philippines
1 Jan 07
Fishes do sleep, you'll know that they're asleep when they are not swimming.
@stailgate (2363)
• United States
1 Jan 07
yes, fish sleep but they can not close their eyes, because of no eye lids, and they are more aware then what we are when we are asleep. I have two 13" pet sharks, and you can tell when they are awake or sleeping. When sleeping the are usually close to the bottom, and making very little movement other then a very small,slow rythmic swishing of the tail fin.
@brokentia (10389)
• United States
10 Dec 06
This is the best answer I could find for you.
http://www.nefsc.noaa.gov/faq/fishfaq1.html
You can check out the website, but this is what is sadi about sleeping.
It all depends on what you mean by sleep. My dictionary says that sleep is a period of rest in which the eyes are closed and there is little or no thought or movement. That is, sleeping means closing your eyes and resting. The first thing we notice is that most fish don't have eyelids (except for sharks). Also, while some deep ocean fish never stop moving a great many fishes live nearly motionless lives and many do so on a regular diurnal/noctural cycle, some active by day others by night.. So we can't generalize and say that all fish sleep like we do. But most fish do rest. Usually they just blank their minds and do what we might call daydreaming. Some float in place, some wedge themselves into a spot in the mud or the coral, some even build themselves a nest. They will still be alert for danger, but they will also be "sleeping."
