Which outcome occurs when fish encounter hypoxic water forcing anaerobic respiration?

💡 Explanation

When fish experience hypoxic conditions, anaerobic respiration kicks in because oxygen is not available as the final electron acceptor for aerobic respiration resulting in lactic acid production. Therefore, lactic acid accumulation results, rather than increased ammonia excretion, enhanced sodium uptake, or decreased red blood production which require different metabolic adjustments.

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