• An air sac, sometimes double or variously lobed, in thevisceral cavity of many fishes. It originates in the same way as thelungs of air-breathing vertebrates, and in the adult may retain atubular connection with the pharynx or esophagus.


    Air bladder meaning & definition 1 of Air bladder.


  • a small bag of air or gas inside a fishs body, that helps it to float or breathe

    Air bladder meaning & definition 2 of Air bladder.

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