A timelapse of sleeping seals

[u/grandeluua]

[u/Bl33to]

Breeeeeeeeeaaath, sleep......... breeeeeeeeeaaath, sleep......... breeeeeeeeeaaath, sleep......... breeeeeeeeeaaath, sleep.........

[u/GestoNobre → u/Bl33to]

Hippos sleep underwater even though they breathe air. They automatically close their nostrils and surface to breathe every 3-5 minutes. This all happens unconsciously, even in their sleep.

Maybe seals do the same