an air-filled sac near the spinal column in many fishes that helps maintain buoyancy 同义词：air bladder, float,
例句与用法
1.
Transplant fish ' s swim bladder for dog ' s urinary bladder success fully in indian 印度成功地将鱼浮囊移植给犬做膀胱
2.
Study on the postembryonic development of the gill , pseudobranchand swim bladder of the white achama 伪鳃和鳔胚后发育学研究
3.
All sharks lack a swim bladder , so that their bodies are not buoyed up in the water and they have to keep swimming or they sink 体内没有鱼鳔，因此身体不会自动浮升，必须不断游泳，防止沉下水底。
4.
" many fish larvae hatch without fully formed pectoral fins and all hatch without a swim bladder , so similar problems could occur for them . “很多小鱼孵化出来时，胸鳍还没有完全成形，而且所有的鱼孵化时都还没有形成鱼鳔。
5.
But a new study of zebrafish larvae concludes it ' s their poorly developed side fins and ineffective swim bladder that holds them back . they simply ca n ' t keep their bodies horizontal . the finding might apply to other species , researchers say 这项以斑马鱼幼仔为对象的研究显示，小鱼的游泳技巧之所以糟糕是因为它们发育尚不完善的侧鳍和鱼鳔所导致的，它们不能保持身体水平。
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