Fish live their entire lives surrounded by water, but how do they actually obtain oxygen from it? The fascinating science behind fish respiration is explored in this video by exploring how gills work, why water flow is important, and what makes fish so perfectly adapted to underwater life. From microscopic gill structures to clever evolutionary tricks like countercurrent exchange, you'll discover why fish can breathe underwater, but struggle the moment they leave it. We will explain why fish are unable to breathe out of water, how different species adapt to low-oxygen environments, and why this hidden process is much more efficient than you might think. One of those everyday mysteries that turns out to be even more impressive once you understand what's really happening underneath the surface.
