swim bladderswim bladder
a gas-filled sac in the dorsal portion of the body cavity of most bony fishes, giving buoyancy to the body and used as an accessory, lunglike organ in lungfishes
A gas-filled structure in many fishes that functions to maintain buoyancy and, in some species, to aid in respiration or to produce sound. Also called air bladder . Also called gas bladder .
(plural swim bladders)
- Alternative spelling of swim bladder.