Question

why do fisher breath faster?

Answer 1

This is because its body is used tobreathing through gills.Air has around twenty times more oxygen than water does, and water is also heavier than air, so it's harder to move into thefish's gills. Since there's less oxygen in the water and the water is harder to move around, fish need to breathemore quickly.

Answer 2

You can see how fast a fish is breathing by watching the gill cover move. You will see that they breathe faster in warm water.One reason is that warm water holds less oxygen. Another is that the warmer water will speed up the metabolism of the fish, which means they need more oxygen.