Science, asked by harshad17, 10 months ago

Rohan visits a aquarium the fish continuously opens and closes the mouth while swimming why do they do so

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Answered by Priyanshis

because they take oxygen

Answered by TheImmortal49

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

harshad17: is gills present in the mouth of the fish

TheImmortal49: yeah

TheImmortal49: it is inside the mouth

TheImmortal49: that is why they take in water

TheImmortal49: to extract dissolved oxygen

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Rohan visits a aquarium the fish continuously opens and closes the mouth while swimming why do they do so​

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Rohan visits a aquarium the fish continuously opens and closes the mouth while swimming why do they do so