why do fishes open and close their mouth so frequently when swimming i – InterviewSolution

InterviewSolution

1.	why do fishes open and close their mouth so frequently when swimming in water
Answer» <p>They are breathing through their mouths. Fish require a steady flow of water through their gills to be able to extract oxygen from it; the easiest way to make the water flow is to suck it in through their mouths and squeeze it out past their gills.</p> <p>thanks didi 😄😄</p>

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