How does a swim bladder help the ray-finned fishes maintain buoyancy?

Question

Quizplus · Accepted Answer

The swim bladder in ray-finned fishes is filled with gas, usually oxygen or nitrogen, which increases or decreases in volume as the fish changes its depth in the water. As the fish descends, the pressure increases, compressing the gas in the bladder, making the fish more compact and denser. On the other hand, as the fish rises towards the surface, the pressure decreases, allowing the gas in the bladder to expand and increasing the fish's buoyancy. The swim bladder helps the ray-finned fishes to control their depth in the water column and maintain neutral buoyancy.

How Does a Swim Bladder Help the Ray-Finned Fishes Maintain