If a ray-finned fish is to both hover (remain stationary)in the water column and ventilate its gills effectively, then what other structure besides its swim bladder will it use?
A) its heart
B) its pectoral fins
C) its lateral line system
D) its caudal (tail) fin
E) its opercula

Question

Quizplus · Accepted Answer

The opercula, or gill covers, play a crucial role in the process of ventilating the gills in fish, allowing them to breathe even while stationary. By opening and closing the opercula, water is drawn over the gills, facilitating gas exchange.

If a Ray-Finned Fish Is to Both Hover (Remain Stationary)in