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 ...

Fish don’t have eyelids. They don’t curl up in beds or snore, so it’s easy to assume they just keep swimming forever without rest. But they do sleep—it just looks very different from how we do it.

If you have children, or ever interact with them, the chances are you have heard them ask about whether or not fish sleep. On the surface, this seems like a very simple question, but trying to give ...

Whether tucked away in a colony of coral, hidden in the darkness of an aquatic cave or floating catatonic just above the ...

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 ...