why fish can’t breathe in air despite air having plenty of oxygen

Question

If fish use their gills to filter oxygen from water, why can’t they do the same in air?

In: 14

Answer 1

There’s oxygen in water, why can’t you breathe underwater?

The answer to your question though is that fish bodies, in particular their gills, cannot handle being out of water and thus can’t handle breathing and getting oxygen through their blood.