Fish spend their entire lives underwater, so the idea of them suffocating sounds impossible. After all, water is their world. But sometimes, the very thing keeping them alive slowly turns dangerous. Lakes suddenly fill with dead fish. Aquarium fish rush desperately to the surface. Oceans that once supported life become silent zones. So what is really happening beneath the water? The answer is stranger than most people think. Fish may not drown the way humans do, but they absolutely can lose the ability to breathe. And once you understand why, you may never look at water the same way again.
