Definition for Swim bladder

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Revision as of 22:49, 26 January 2011 by PPK (Talk | contribs) (Created page with "A gas-filled, balloon-like structure that helps a fish to remain buoyant in the water even when it is completely stationary.")

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A gas-filled, balloon-like structure that helps a fish to remain buoyant in the water even when it is completely stationary.