Which animal sleeps with open eyes?
Snakes actually sleep with their eyes 'open', as they don't have eyelids to close their eyes. Instead, their eyes are covered with transparent scales which protect their eyes and stop them becoming dry – these are called 'spectacles'.
These freaky creatures prefer to sleep with their eyes open. This is down to a cool evolutionary feat called unihemispheric sleeping – the ability to rest one half of the brain at a time, leaving one eye open to look out for potential attacks. Or in some cases, just a lack of eyelids!
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What are your thoughts on this subject?
14 Comments
Wayne Todd
Fish is a correct answer as well.
rkcorrigan
Poor question. The picture does not always tell the story. Fish also “sleep” with their eyes open as they have no eyelids with which to close their eyes. Deceptive questions like this should be removed.
dan chesters
Multiple correct answers if you take a peek underwater, you'll find that fish sleep without closing their eyes, since they don't have eyelids either :-/
Denise Currie
Disliked and reported, you can't have 2 correct answers, and it means I have lost points yet again in a bonus quiz. this is getting beyone a joke now
Jhan Schmitz
Two correct answers: snakes and fish.
earlepg
Giraffes and frogs can play the open-eye sleep game at times, but fish and snakes share the lack of eyelids. I took the picture of the snake as indicating the answer from this particular clone. Yet another report to be made.
Lorna Shipton
Fish don't have eyelids (except sharks).Therefore, they sleep with their eyes open!
Louella Wilson
There are many animals that sleep with either both, or only one eye open. Including snakes, fish, blackbirds and some whales and dolphins.
Chris Braid
Fish is also a correct answer!
Paul Chalk
What about FISH! you womble!
Lynne Zeman
I did a double on this Q. I know that neither snakes or fish have eyelids so I did a double to ensure I got points. Authors and proffers need to do their research.
Wesley Traefald
Fish would be correct also
Denise Currie
Fish also sleep with their eyes open, so once again two correct answers. I want my points my answer was correct
illonabird
I didn’t trust the picture, but chose it anyway. Had to trust something as I had no idea.