No, most of the fish can not blink because they absence eyelids. The main function of eyelids in humans and also other land animals is to save the eye (cornea) moist. However, fish actually don’t require eyelids because their surrounding setting is water. Together fish don’t need and have eyelids, they can’t blink their eyes. That is interesting to note that there are some sharks that have actually a transparent nictitating membrane i m sorry they have the right to blink throughout feeding time to defend their eyes.




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Shark Eye, photo credit: Jean-Lou Justine

Read: execute Fish have Tongues?

How fish sleep without eyelids?

Now you need to thinking around how perform fish sleep there is no eyelids? or do fish sleep without closing your eyes?

Yes, fish perform sleep, and also that also with their eyes open. Fish carry out not sleep as human beings or various other land pets do. Fish generally take rest in which they alleviate their metabolism and also other activities by almost half. Fish life in seas are always prone to the hazard of strike by predators. Therefore, they need to be constantly alert in order to prevent danger. Fish have adapted to this environment such the they can stay relax and alert simultaneously. Due to the fact that fish don’t have eyelids, they have to sleep or rest with their eyes open. Comparable to humans, most of the fish additionally sleep during the night time.

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Due to the fact that it is dark in the night and also fish cannot watch in the dark. Therefore, lock don’t gain bothered by keeping their eyes open up while resting.