Rohan visits a aquarium the fish continuously opens and closes the mouth while swimming why do they do so
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because they take oxygen
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Fishes open their mouths and close it repeatedly so that water can enter the gills which is present inside the mouth. Gills use water to extract dissolved oxygen from water as oxygen is needed for respiration and survival.
TheImmortal49:
PLZ mark as brainliest
is gills present in the mouth of the fish
yeah
it is inside the mouth
that is why they take in water
to extract dissolved oxygen
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