River fish like our hilsa, they keep drinking less and pass thin water, no? Sea fish drink more and push salt out through special skin cells—these must be your chloride cells. But when hilsa goes to sea to breed, its body slowly changes the system, like adjusting a net.
I see it in their weight and fight. A true saline hilsa from the sea is oily and strong; a river-caught one is lighter. The book-fishermen in city say both same, but my hands feel the difference...no?
#surfing#mulki
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