Do fish sleep....

@jhl930 (3606)
United States
February 14, 2008 12:13pm CST
I have had fish before whenever I was younger and I was just wondernig if they sleep..because I don't ever remember seeing them sleep before...but who knows..and I ask a few people as a joke and they said they had never saw a fish sleep before so they didn't think that they did sleep...and I was thinking I dont think that fish sleep...do they?
2 people like this
3 responses
@whittby (3073)
• United States
14 Feb 08
I looked this up since I was curious. Evidently, they rest (they don't have eyelids to close) and it's more of a daydream like state than our sleep state. So they are motionless and the term would more correctly be "resting" since they are alert to danger during this time. Some fish can stay motionless, while other fish such as a shark, have to remain in motion to stay alive. They either have to swim or maybe stay in a current to keep moving. whit
1 person likes this
@chrislotz (8207)
• Canada
29 Feb 08
Yes I do believe they do sleep. I think they sleep with their eyes open. You know they are asleep because they don't move when they are sleeping and they huddle down close to the bottom. Now don't ask me how I know this, I just do. I must have read it somewhere or heard it or something.
@CAMILLERI (373)
• Australia
18 Feb 08
I am sure that I read somewhere that fish especially large ones actually do sleep. I an so sorry I cannt remember the reference. It is worthwhile to research the subject.