These are some of the animals of the world ranked by how long they sleep. Have you ever wondered how long a Dolphin sleeps? Or what about a Tortoise? Watch this video to find out!

This probability comparison / comparison video is made based on community discussions and relevant sources, numbers and facts listed might not be up to date, valid or in any specific order.

Sources:
https://thomsonsafaris.com/blog/sleep...
https://www.nationalgeographic.com/ph...
http://www.milkproduction.com/Library...
https://www.sleepline.com/dogoldfish...
https://petcentral.chewy.com/whatyou...
http://designstudio.com/blog/g85d4f.p...
https://www.sleep.org/articles/sleep...

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