Noun
swim bladder (plural swim bladders)
(anatomy, usually of fish) A gas-filled sac within the bodies of most fish that variously acts as a float, lung, sound-producing organ or an aid to hearing.
Synonyms: air bladder, gas bladder
swim-bladder (plural swim-bladders)
Alternative spelling of swim bladder
swim-bladder
These sonic muscle fibers are contracted against the swim bladder to produce the croaking sound that gives drum and croaker their common name. Source: Internet
Sand tiger sharks store air in their stomachs, using it as a form of swim bladder. Source: Internet
The large swim bladder is more expansive and branched than species outside of sciaenids, which aids in croaking. citation In some species the sonic muscle fibers are only present in males. Source: Internet
These muscles are called sonic muscle fibers, and run horizontally along the fish's body on both sides around the swim bladder and are connected to a central tendon which surrounds the swim bladder ventrally. Source: Internet
The swim bladder of species in sciaenids, is used as a resonating chamber. Source: Internet
They must come to the surface to breathe via their swim bladder. Source: Internet