Yes fish sleep. But it’s not sleep as we know it. They don’t have eyelids to close, they sometimes do it during the day, they don’t show the characteristic brainwave patterns like REM sleep seen in humans, and some, including most sharks have to keep swimming in their sleep.
But fishes do have a period of reduced activity and metabolism which seems to perform the same restorative functions as nocturnal sleep does in humans. Some are more obvious about it than others and actually rest on the bottom or in coral crevices, and parrotfish secrete a mucus “sleeping bag” around themselves before they go to sleep. If you get up quietly in the middle of the night you will find your goldfish in an almost trance- like state, hovering near the bottom of the tank making just the minimum correcting motions with its fins to maintain its position in the water column. If you put food in when they’re like this they take noticeably longer than usual to respond, as if they have trouble waking up.
Title: Re: Do fish sleep?
Post by: Cathrina on May 05, 2013, 05:25:05 PM
Wow so fish sleep maybe fish have dream too..
Title: Re: Do fish sleep?
Post by: xxxchoholic Rai ♥ on May 07, 2013, 12:32:05 AM
right fish do sleep
wala lang kasi sila eyelids kaya di napapansin eh
nice share sir
Title: Re: Do fish sleep?
Post by: sniffer on May 07, 2013, 12:52:23 AM