Why do sharks never sleep? - Extra Education

Q. Why do sharks never sleep?

Some species have to swim all the time, otherwise water stops flowing through their gills so they cannot breathe.

Other rest during special periods, but do not fall into an unconscious state.

Normally, a shark can rest, remaining in place, for no more than an hour. If it fell asleep for a long time, it would die from lack of oxygen.

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Last Updated : Nov 08, 2021