News Animals

Northern elephant seals sleep just two hours a day at sea

The mammals snooze less than 20 minutes at a time during dives

A photo of a northern elephant seal poking its head out of the water.

Northern elephant seals are deep sleepers. Literally. They dive hundreds of meters below the ocean surface to take naps unbothered by sharks or killer whales.

Mark Newman/Getty Images

By Maria Temming

- More than 2 years ago

Read another version of this article at Science News Explores

Northern elephant seals are the true masters of the power nap.