Which physiological response results when a freshwater teleost fish with a swim bladder migrates to saltwater?

💡 Explanation

When a freshwater fish migrates to saltwater, the increased salinity causes osmotic water loss; chloride cells in the gills actively transport chloride ions out of the fish to maintain osmotic balance. Therefore, chloride cell activity increases, rather than a cortisol decrease, pumping rate reduction, or waste retention, all of which hinder osmoregulation.

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