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CBSE Class 9 Answered

why can't we culture marine fishes in fresh water reservoirs?
Asked by | 27 Jun, 2011, 12:00: AM
answered-by-expert Expert Answer

This is because marine fish cannot survive in freshwater.

Osmosis causes the cells in saltwater fish to constantly lose water, which the fish has to replace by drinking salt water, desalinating it with special organs and replenishing the water in its cells
But when put in fresh water, the cells in a saltwater fish would quickly absorb water from the environment, and with no way to eliminate it, the cells would swell, burst and kill the fish.
Answered by | 27 Jun, 2011, 11:11: AM

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