Give reason why the fishes living in salt water dies in normal water
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The fishes living in salt water is adjusted to the environmental factors of salt water. The cells of these are isotonic with that of the salt water. The concentration of salt in the cells of fishes is same as that of the salt water.
When these are put in normal water which has relatively lower salt concentration, the water enters the cell of fishes through endosmosis. This results in the bursting of cells which inturn causes death of the organism.
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Osmosis can also kill saltwater fish if not used properly. It is impossible for saltwater fish to live in freshwater because they have already adapted to salt water and high concentration of salt around them. Fish skin is a permeable membrane which allows water to flow in and out.
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