Which outcome occurs when a fish fills its swim bladder with CO₂ at depth?

💡 Explanation

Reduced O₂ uptake decreases buoyancy rather than improving it, because maintaining hydrostatic equilibrium requires gas exchange to adjust density with changes in depth; therefore, balance becomes harder to achieve rather than easier, due to disruption in volume regulation.

• Which mechanism minimizes water loss when marine fish osmoregulate?
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• Which consequence results when a fish's swim bladder is punctured during predator escape?
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