5. Otters
Sea otters have one of the most charming sleep routines in the animal kingdom. They float on their backs, often wrapping themselves in kelp to anchor in place. Even more endearing, otters will hold hands with one another, forming ‘rafts’ to keep from drifting apart as they snooze.
This social sleeping behavior not only fosters group bonds but also helps protect them from predators lurking below. Details