Ah, freshwater fish must constantly pump out water, while marine fish drink seawater and excrete salt—their chloride cells in the gills manage this. The amazing switch in fish like hilsa happens over time as their bodies slowly adjust the function of those very cells. But I tell you, seeing my own guppies struggle when I once misjudged the salt mix for their tank taught me that this balance is a fragile, living art, not just a textbook diagram. For a creature to move between rivers and seas, it is less like a switch and more like a slow, careful prayer.
#surfing#mulki
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