Swim bladder
The swim bladder is an internal pocket with the Abdomen of the Poisson S of the Superclasse of the Ostéichthyens which, according to whether it is filled or emptied gas which it contains, determines the Flottabilité fish and thus makes it possible this last to vertically move in the Eau.
One finds at the gadidés of it, like the Morue and the Merluche. It of it is an edible part, particularly rich in gelatin.
Certain fish as the Ginglymodes use their swim bladder like auxiliary body of the Respiration. Some Species S like the Thin and those of the family of the Triglidae can make vibrate their swim bladder to produce sounds.
Certain infectious illness or parasitic, can cause in fish, an incapacity to control their swim bladder. Sometimes they cannot then be maintained any more between two water, but are found to float on the surface without wanting it, sometimes to run at the bottom of water.
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