Add Yahoo as a preferred source to see more of our stories on Google. A large group of yellowfin tuna swimming off the coast of Italy. Like all fish, they sleep, but it's not like human sleep.

Add Yahoo as a preferred source to see more of our stories on Google. A protective mucous cocoon surrounds this parrotfish as it sleeps in Australia's Great Barrier Reef. This layer of protection ...

There are tens of thousands species of fish around the world, whether it's in an aquarium, river, lake, or ocean. Like all animals (and humans), every single one needs some form of rest for cognitive ...

Just like humans, Betta fish sleep at night. "When sleeping, they become still, with their eyes open because of their absence of eyelids. Betta fish may lose their color while sleeping (it's their ...

Do fish sleep? Even scientists have struggled to understand the process, but new research reveals how different species rest. Learn how to spot if your fish is napping. Many fish owners have tapped on ...

Ever wondered if and how fish sleep? According to a piece in The Conversation by Michael Heithaus, he was always curious about how fish rest. The marine biologist wondered how in a body of water with ...

Add Yahoo as a preferred source to see more of our stories on Google. Even fish need to sleep. But do they sleep with their eyes open? Photo: Getty Images Do fish actually sleep? And if so, how, when ...

Sleep is one of the most essential parts of being human. Catching some Z’s is important for daily functioning. As adults, we've got to get in about eight hours a day, according to the Sleep Foundation ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Could you explain how fish sleep? Do they drift ...

A common question among fish owners is: “Do fish sleep?” Simple answer: yes, but sleep in fish may not look like what you’d expect. Fish require sleep, like most other vertebrates, as part of their ...

A large group of yellowfin tuna swimming off the coast of Italy. Like all fish, they sleep, but it’s not like human sleep. Giordano Cipriani/The Image Bank via Getty Images Michael Heithaus, Florida ...