Aquatic animals like fish excrete their wastes in gaseous form as (a) Oxygen (b) Hydrogen (c) Ammonia (d) Nitrogen

c) Ammonia


Aquatic animals perform the procedure of ‘Excretion’ depending on the availability and unavailability of water. They excrete their waste in the form of ammonia.The process where certain organisms excrete nitrogenous waste in the form of ammonia is known as Ammonotelism.Ammonia, which is highly water-soluble and which forms ammonium hydroxide (NH4 OH) directly injures cells by the alkaline caustic action. Therefore, the excretion of ammonia requires large amounts of water. A portion of uric acid is oxidized furthermore to form allantoic acid and allantoin.

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