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 ...

In this video, How Fish Breath Oxygen Within Water explains the fascinating process of how fish extract oxygen from water using their gills. Learn the science behind aquatic respiration and understand ...

Fish live surrounded by water, so the idea that they might struggle to breathe sounds wrong at first. It feels like asking whether birds can fall out of the sky. Still, the question keeps coming up, ...