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 ...

A protective mucous cocoon surrounds this parrotfish as it sleeps in Australia's Great Barrier Reef. This layer of protection helps fend off predators so parrotfish can get a good night's rest.

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 ...

Many grad students can sympathize with the blind form of the Mexican tetra. Researchers speculate they sleep only a few hours a night, because they simply don't have time to rest. "These fish live in ...

An intriguing new study is offering insights into the origins of sleep, for the first time discovering zebrafish brains shift through several brain states while sleeping. The researchers suggest these ...

GOLDEN VALLEY, Minn. — Many of us know all too well about sleep (or lack thereof), and the art of catching Zzzzzs remains a mystery to scientists. Now, a little fish is giving us clues to the origins ...

She showed up for a night of “sex to change the course of the world.” He locked the door behind her and duct-taped the air vents to save the human race. With a careful calculation of comet speed, fish ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

They make great pets — quiet, docile, friendly enough — but do fish sleep? Scientists have found that most fish do sleep, and as with humans, they don't always get the shut-eye they'd like. A new ...