In kindergarten we had pet fish and our teacher told us they were sleeping when they were really dead and they were flip over onto their backs and the next day they were gone:(sorry just wanted to share. Haha
Yeah. When mine do, they float towards the top of the tank but don't flip over. They appear to be stationary. Their eyes are open though because they have no eyelids, therefore making it impossible for them to close their eyes.
1 year ago
Last edited at 4:01AM on 2/26/2012
Yes, they do sleep.There eyelids are so transparent that one cannot see them with naked eyes.So we can't estimate that a fish doesn't sleep.we can know about it by observing the rate at which it opens its mouth to respire and by its movement of its fins i.e.. there rate of respiration decreases and there fins don't move much.
Most fish do not have eyelids. But there are some, including sharks, that do have a translucent lid that lowers during it's rest period. This allows the fish to sense differences in light and movement while protecting their eyes. What I wonder is...why did evolution leave the rest of the fish species out when it came to protecting their eyes during 'sleep'?
Yes fish sleep, every animal does. They don't necessarily sleep with their eyes open per say - they have no eyelids. Instead of eyelids, they can bring a kind of invisible film over their eyes, they also blink like this.
they turn off one side of there brain at a time, unlike humans we sleep, but they rest one side at a time. but if they become frightened they can immediately turn it back on. like how if someone blows in your eye you blink.
Prefiero was right. Although many aquatic animals such as fish and dolphins, as well as other animals that cannot come to rest on shore, can shut down one half of their brain to rest while the other stays awake to let them escape danger as well as allow air-breathing animals to resurface for air
Sorry, I know you already have a million answers, but I want to tell my story: My pet fish was at the top of the bowl, not moving. I thought he was dead, so i tried to touch him, and he rocketed away so fast that it scared me! So yes, I think fish sleep
1 year ago
Last edited at 12:00AM on 2/27/2012
yes ..!! when they sleep it looks like they are dead ..so when i had a goldfish i really used to get scared but since they sleep with their eyes open just keep the lights closed of the room ...they usually sleep under something like any decoration