We know marine mammals like dolphins sleep in water as they are swimming in water !!!!
How it is possible?
These marine mammals often engage in the pattern of sleep called uni hemisphereic slow wave sleep.
This state of the sleep allows one hemisphere of their brain to rest while the other remains partially active.
This enables them to control essential functions such as breathing and maintaining awareness of their surroundings.
Marine mammals like whales exhibit surface resting behaviour.
During this time, they close their one eye to protect from environment while keeping the other eye open to monitor the surrounding.
Dolphins engage in social resting behaviour where they form groups and take turns sleeping while others keep watch.
They often take short power naps which lasts only a few minutes.
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