air bladder

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Related to Gas bladder: Fish maw, air bladder

air bladder,

in fish: see swim bladderswim bladder,
large, thin-walled sac in some fishes that may function in several ways, e.g., as a buoyant float, a sound producer and receptor, and a respiratory organ. The swim bladder, or air bladder, is located in the dorsal portion of the body cavity and is filled with gases.
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References in periodicals archive ?
In addition, with the gradual reduction of the yolk sac and the emergence and development of the gas bladder and pectoral fins, the larvae began to move horizontally at different levels of water column.
This trend is explained by the fact that in the early days old larvae of marine fish are very fragile, with low survival, as the energy demand and protein necessary for morphological changes such as formation of the mouth, anus, pigmentation of the eyes, gas bladder, fins, scales and other organs of the digestive system is very large (Yufera & Darias, 2007).
The gas bladder lies at the top (dorsal) of the abdominal cavity and looks like a white sausage running along the underside of the backbone.
Researchers at Texas A&M University tested venting or fizzing, in which a hollow needle punctures the gas bladder to relieve pressure, and rapid recompression, which quickly returns fish to the depth of capture where symptoms are alleviated, on red snapper* Methods of recompression include weighted hooks or jigs, weighted cages, and pressure-activated devices like the SeaQualizer, which the researchers employed in this study.
Instead of venting the gas into the atmosphere, it is collected in the gas bladders and pumped to liquefier equipment.