Which physiological risk increases when a freshwater fish experiences gill filament damage?

💡 Explanation

When freshwater fish experience gill damage, impaired osmoregulation occurs because the gills' selective permeability is disrupted leading to excessive water influx via osmosis. Therefore, overhydration risk increases, rather than dehydration, hypothermia, or toxicity which stem from reversed osmoregulatory problems and disruptions to temperature regulation, or waste removal.

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