Sea Creatures That Never Sleep: The Ocean's Most Tireless Survivors

Sleep is one of the great mysteries of life. Almost every animal studied by scientists shows some form of rest, yet not all creatures sleep in the way humans do. In the oceans, where predators, tides and changing currents create constant challenges, some marine animals appear to remain active around the clock. Certain species never enter a deep, prolonged sleep, while others rest in ways that are so brief or subtle that they are difficult to detect. These extraordinary adaptations have puzzled researchers for decades and continue to reshape our understanding of what sleep actually is. The deeper scientists explore the oceans, the more surprising the answers become.