Question

how is the respiration takes place in fishes

Answer 1

ITS BECOZ OF RESPIRATORY ORGAN GILLS
AIR IN WATER PASSES THROUGH IT
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Answer 2

In most fish respiration takes place through gills. Lungfish however, possess one or two lungs. Fish use the process known as countercurrent flow, in which water and blood flow in opposite directions. across the gills, maximizing the diffusion of oxygen.