IbArrA
Number of posts : 58
KARMA : 2
Registration date : 2009-03-06
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Subject: Do fish drink water? Fri Mar 06, 2009 10:08 pm |
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The answer is yes, they drink it. Saltwater fish do so under duress. Gulp! The greater concentration of salt in the water outside their bodies is constantly drawing the less salty fluid inside them out through their skin, a porous membrane, through the process of osmosis. Therefore they have to be drinking constantly to replace that lost fluid. Freshwater fish don't have this problem and don't need to drink, but they take in some water anyway when they open their mouths to eat.
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