How do fish breathe underwater and the differences between gills and lungs. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Like humans, fish ...

Watching a fish glide through water gives the impression that it moves in a world foreign to ours. But if we need air to live, how do these animals manage to breathe beneath the surface, where our ...

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 ...