3 ms·
I think all aquatic mammals do this - they don't have much choice since they need to surface to breathe, so need to be semi-awake all the time.
by HarHarVeryFunny 2y ago
I think all aquatic mammals do this - they don't have much choice since they need to surface to breathe, so need to be semi-awake all the time.
- yencabulator 2y agoNot walruses: https://animals.howstuffworks.com/mammals/walrus-sleep-without-drowing.htm https://animals.howstuffworks.com/mammals/walrus-sleep-witho... Not otters: https://www.animalwised.com/how-do-otters-sleep-4669.html https://www.animalwised.com/how-do-otters-sleep-4669.html