Eli5 : How do whales and dolphins sleep ? Do they go outside water or do they stay inside, but in this case how can they breathe ?

Question

Eli5 : How do whales and dolphins sleep ? Do they go outside water or do they stay inside, but in this case how can they breathe ?

In: Biology

Answer 1

They sleep in the water. Whales will sleep vertically.

Dolphins sleep with one half of their brain at a time