You’re staring at your aquarium. It’s late. Everything is quiet. And there’s your fish, floating calmly, fins moving slowly, eyes wide open. Are they... asleep? Or just zoning out? Fish don’t come ...

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.

Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports. Native to southeast Asia, this species is known for its range of vibrant hues. There ...

As anybody who's cuddled up to a slumbering cat or dog can tell you, pets have a profoundly relaxing, restful effect on our ...

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 ...

It turns out, our furry best friend might be our sleep enemy. Lots of pet owners let their animals sleep on the bed with them, which usually disrupts sleep. But many would say it’s worth it. And ...

Fish are often considered a low-maintenance pet option for children or busy adults. That’s not necessarily the truth, according to experts. “Pet fish require just as much work as any other pet,” says ...

Sleep in fish may look different from humans, but rest is essential for survival. Here’s what experts have to say about fish sleep. A protective mucous cocoon surrounds this parrotfish as it sleeps in ...