Do great white sharks sleeps

Answer 1

It is not really known whether sharks, including Great Whites, do sleep, but there are several theories.

One theory is that sharks do sleep, but with only one cerebral hemisphere at a time, meaning that at least either side of the shark's brain is on the alert constantly.

Sharks have been known to lie motionless in a resting state, yet their eyes have followed the movements of divers, so it may be that this inactivity is their form of sleep, rather than full unconsciousness.