Many fishes of freshwater can't live in sea water and vice -versa because of

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11.Organisms and Populations

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Many fishes of freshwater can't live in sea water and vice -versa because of

Nutrient

Osmotic problems

Breathing problems

Excretion problems

Solution

Osmotic problems.

Some organisms are tolerant to wide range of salinities called euryhaline, $e . g .,$ salmon fish but others are restricted to narrow range called stenohaline like shark and string rays. Many freshwater animals cannot live for long in sea water and vice-versa because of the osmotic problems they would face

Standard 12

Biology