Watching a fish glide through water gives the impression that it moves in a world foreign to ours. But if we need air to live, how do these animals manage to breathe beneath the surface, where our ...

Add Yahoo as a preferred source to see more of our stories on Google. If you see it, kill it. An invasive fish species is harming the Mississippi ecosystem, and you can help stop it. Northern ...

How do fish breathe underwater? -- Mordechai Linfield, 8, Silver Spring With all the talk this summer about those exotic snakeheads climbing out of ponds and trotting about in the open air, we almost ...

When you and I take a deep breath, we pull air into our lungs. That’s because humans are mammals. But fish aren’t mammals. They usually don’t breathe air. They usually don’t have lungs. That’s what I ...

Fish live underwater but still depend on dissolved oxygen to survive. When oxygen levels drop due to heat, pollution, or ...

An invasive fish species that can breathe air and survive on land has been found in Georgia for the first time. And officials are warning anyone who comes into contact with the species to kill it ...