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 ...

A study has found that observing how actively a fish moves in its youth and when it sleeps can help predict whether it will ...

Some fish, it turns out, are morning people. They swim hard during daylight, sleep mostly at night, and tend to live longer.

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 ...

Sleep is thought to be vital for the health of animals including us, but one kind of cavefish can somehow manage without it. Yet the cavefish appear to be healthy despite this lack of sleep, with ...

Like the movie *The Truman Show*, which depicts a person’s entire life being broadcast in real-time without their knowledge, ...

Scientists tracking the entire life of the African turquoise killifish have discovered that behavior alone can predict ...