A recent study has uncovered how sperm whales maintain buoyancy while resting. Researchers tagged 42 free-ranging whales in Northern Norway and observed that all released bubbles during rest. This bubble-blowing behavior helps counteract the expansion of lung gases and allows the whales to achieve neutral buoyancy. Sperm whales rest vertically, often transitioning from a head-down dive to a head-up position, enabling long, stable rest periods that can last minutes to hours. The findings suggest that whales may have precise control of their position even while potentially sleeping, highlighting a unique survival adaptation in these endangered marine mammals. https://www.accuweather.com/en/weather-news/sleeping-giant-how-sperm-whales-stay-afloat-while-resting/1917627