The purpose of the eyelid is to keep the eye moist. Fish live in water, and so the eye does't need moistening, and so fish don't have eyelids. Thus they sleep with their eyes open because they have no way to close them.
For Starters, fish don't sleep, but they do go into a resting period.
If fish slept they would not close their eyelids because they don't have any!
Thank you
Dolphins keep one eye open when they sleep so that if their enemies come to eat them they see them coming and can react and get themselves out of danger.
Because it has so stay alert for danger.
no
with the eyes closed
because fish have no eyelids
they sleep with their eyes open just like a spider
fish open there eyes during there sleeping is because they are board at looking at nothing there its answered
fish dont have eyelids
goldfish sleep with their eye open their eye are open all the time. Gold fish sleep with there eyes open...But they have a clear lid that over laps there eyes in which they see out of so there eyes are closed they just have a different lid then humans. Hope that helps you:)
The animals that sleep with their eyes open are Snakes, Fish, Insects and Guinea pigs there are many more as well.
Yes, bats do actually sleep with their eyes open although they do have the ability to shut them. Frogs and fish also sleep with their eyes open and surprisingly so do cattle! However, as they are unconscious they are not able to see.
Because they are just that cool. And they have those kind of skills.
Incase something eats it and because they don't have eyelids
Yes they sleep with their eyes open :)