How do fish breathe underwater?
Fish Breath Trick
How do fish breathe underwater?
You can hold your breath underwater for maybe a minute if you're good at it. Fish stay down there their whole lives — eating, sleeping, chasing each other around coral like it's no big deal. They're not holding their breath. They're breathing the whole time. So what's their secret?
Here's the thing: there's oxygen in water. Not a lot — about thirty times less than in air — but it's there, dissolved between the water molecules like sugar dissolved in lemonade. You can't use it because your lungs are built to grab oxygen from air. Fish have a different tool.
