Which outcome results when a saltwater fish with damaged gills enters a freshwater environment?

💡 Explanation

When a saltwater fish with damaged gills enters freshwater, osmoregulation fails due to impaired ion transport, causing water to diffuse passively into the fish's hypertonic tissues via osmosis. Therefore excessive water influx results, rather than sodium excretion, thermogenesis, or gill collapse which require different physiological processes.

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