Did you mean: Do Fish Sleep with Their Eyes Open?
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Sleep in fish

en.wikipedia.org/wiki/Sleep_in_fish

Whether fish sleep is an intriguing question, to the point of having inspired the title of several popular science books. In birds and mammals, sleep is defined by eye closure and the presence of .....

Do Fish Sleep with Their Eyes Open? | Wonderopolis

wonderopolis.org/wonder/do-fish-sleep-with-their-eyes-open

They are sleeping, and they can sleep at any time during the day or night. Fish do sleep with their eyes open, because they don't have eyelids (except for some ...

Do fish sleep with their eyes open? - Quora

www.quora.com/Do-fish-sleep-with-their-eyes-open

Essentially all organisms with a true brain sleep. As far as I know, all vertebrates sleep. ... Fish do sleep and the "kinds" of sleep fish display is determined to a great extent upon the kind of lives they lead. 530 Views · View Upvotes ...

www.ask.com/youtube?q=Do Fish Sleep with There Eyes Open?&v=z6pQvWZemVc
Aug 3, 2009 ... Scientific study to see if fish do actually sleep. Evidently they do. ... ha ha, fish dont sleep they rest there dead :D. Read more. Show less. Reply

How Do Fish Sleep Without Closing their Eyes? » Science ABC

www.scienceabc.com/nature/animals/how-do-fish-sleep-without-even-closing-their-eyes.html

How in the name of God do fish sleep when they are surrounded by water all the time? Of course, they ... Therefore, they sleep with their eyes open! This has led ...

Do Goldfish Sleep? How, when and how can you tell? | The Goldfish ...

thegoldfishtank.com/goldfish-info/facts/do-goldfish-sleep/

Do goldfish sleep with their eyes open? Do goldfish sleep at night ... The answer is that goldfish do sleep, but not in the same way we do. Goldfish sleep is more ...

How Do Fish Sleep | Sleep.org

sleep.org/articles/do-fish-sleep/

Find out the truth about whether or not fish sleep. ... sharks are the only fish that even have them and only close them to protect their eyes during encounters with  ...

Why do fish not have eyelids? - The Naked Scientists

www.thenakedscientists.com/HTML/questions/question/2273/

Apr 19, 2009 ... Answer to the science question: Why don't fish have eyelids? ... How long do they sleep and how can they rest if their eyes never close?

Do fishes sleep? | S.U.R.E. - National Library Board

www.nlb.gov.sg/sure/do-fishes-sleep/

Dec 5, 2014 ... However they sleep with their eyes open as they do not have eyelids. ... Fishes do have a period of reduced activity and metabolism which ...

ELI5: Why can some animals sleep with their eyes open but humans ...

www.reddit.com/r/explainlikeimfive/comments/34ijtg/eli5_why_can_some_animals_sleep_with_their_eyes/

May 1, 2015 ... ELI5: Why can some animals sleep with their eyes open but humans can't? ... There are animals out there (most, if not all fish, snakes, etc.) ...

Answer
Fish generally go into an energy saving mode of "rest" but do not "sleep" in the same way land animals do.
Since they do not have eyelids, they sleep with their eyes open.
More Info

Why can't fish close their eyes, do they sleep keeping their eyes open?

www.quora.com

Yes..!!! They are sleeping, and they can sleep at any time during the day or night. Fish do sleep with their eyes open, because they don't have eye lids (except for ...

How do fish sleep? | The Big Question

bigquestion.wordpress.com

Mar 4, 2008 ... Answer2:How can you tell if a fish is asleep? In human terms, they ... fishe sleep but don't close there eyes the only shut do. alejandra, on July ...

Do fish sleep? | The Fisheries Blog

thefisheriesblog.com

Mar 9, 2014 ... The short answer is yes; most fish do sleep. ... Though they are in a restful state, many fish are still acutely alert for danger – sleeping, in essence, with one eye open. ... Some parrotfish create their own “mosquito net” to sleep.