How important is the presence of air bladder in Pisces?
Explanation The air bladder is an air-filled sac that lies above the alimentary canal and is found in the members of the class Osteichthyes (bony fishes) and absent in members of the class Chondrichthyes (cartilaginous fishes). The chief function of air the bladder is to maintain buoyancy that helps fishes to float in water without sinking. Since cartilaginous fishes do not have air bladder, they have to swim continuously to avoid sinking whereas the bony fishes possessing air bladders can stay at a particular depth in water without having to waste energy in swimming. Final Answer The air bladder helps in maintaining the buoyancy, speed and agility of bony fishes in water. It helps the fishes to ascend, descend and stay in the water current without expending energy in swimming.
