Whatever method they use to breathe, sharks are able to engage in periods of deep rest while still but do not fall asleep in the traditional sense. Their eyes remain perpetually open, and their …

May 6, 2025 · Sharks might sleep while swimming, with parts of their brain less active, in a state like resting. Sharks do not fall into a deep sleep as humans do, but they get rest in other ways. …

Oct 27, 2025 · Sharks employ a fascinating range of strategies for resting, depending on the species, from active swimming sleep that ensures constant water flow over their gills to lying …

Sep 23, 2025 · While it’s true that some species must swim continuously, science shows that rest and sleep-like states do occur in sharks — just not in the way humans experience them.

Unlike many animals, sharks don’t sleep in the traditional sense. Instead, they enter a state of rest while remaining partially alert to their surroundings. This unique adaptation helps them survive …

Dec 20, 2025 · Through reduced activity periods, possible unihemispheric sleep, and specialized brain circuitry, sharks demonstrate that rest is indeed universal but manifests differently across …

Sharks do not experience sleep like humans or many other mammals, characterized by unconsciousness and prolonged immobility. Instead, their “sleep” involves periods of reduced …

May 25, 2025 · “We now know that at least two species of sharks engage in behavioral sleep, with one of those also meeting some of the physiological criteria for sleep. Both species are buccal …

Sharks do not sleep in the same way that mammals do, as they lack eyelids and do not experience REM (rapid eye movement) sleep. However, sharks exhibit periods of rest or …

Traditional views of sleep do not always apply neatly to aquatic life, particularly for species like sharks that have very different physiological and behavioral adaptations compared to …