An unknown fish is analysed and found to be devoid of both buccal and opercular muscle systems, but has powerful locomotive musculature. This fish must therefore ventilate its gills by
A) Cutaneous respiration
B) Ram ventilation
C) Simple gill ventilation
D) Chambered gill respiration
E) Metabolic oxygenation

Question

Quizplus · Accepted Answer

Ram ventilation is a method used by some fish to force water over their gills by swimming with their mouths open. The absence of buccal and opercular muscles means the fish cannot actively pump water over its gills, so it must rely on its movement through the water (and thus its powerful locomotive musculature) to ventilate its gills.

An Unknown Fish Is Analysed and Found to Be Devoid