DOLPHINFACTSDAILY on Instagram: "Dolphins sleep with one half of their brain at a time to stay alert and continue breathing. This unique ability, called unihemispheric slow-wave sleep, allows one side of the brain to rest while the other remains active. Unlike humans, dolphins must consciously breathe, so they can’t fall into a deep, full sleep. While resting, they often float near the surface or swim slowly, keeping one eye open to watch for predators. They may also take turns sleeping within t

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Slow-wave sleep - Wikipedia