REUTERS/Lucas Jackson/File Photo Like humans, fish need oxygen to survive, so how do they breathe underwater? Oxygen helps release the energy that drives our bodies from sugary chemical glucose in ...

The northern snakehead is not alone in this ability: Walking catfishes, lungfishes, and betta fish can all breathe air directly as well. These fish reach sexual maturity between one and three ...

We’re here at the lake to find out how different animals breathe. All animals need to take in oxygen and get rid of carbon dioxide, but they can do this in very different ways. Take fish ...

A new study by researchers at the Kwame Nkrumah University of Science and Technology has revealed that the African catfish ...

Betta fish—also known as Siamese fighting fish ... Because their usual habitats are extremely low in oxygen, bettas have evolved to breathe air at the water’s surface. This ability develops ...