How do bony fish regulate buoyancy?

Question

Quizplus · Accepted Answer

Bony fish typically have an air-filled swim bladder that they can manipulate to adjust their buoyancy. By varying the amount of gas in the swim bladder, the fish can control their position in the water column. This allows them to conserve energy by not constantly having to swim to maintain a certain depth. Option B is incorrect because while some species of fish do have oil-filled livers, this adaptation is primarily used for energy storage, not buoyancy regulation. Option C is incorrect because constantly swimming at an upward angle would require a lot of energy and would not be an efficient way to regulate buoyancy. Option D is incorrect because while the bones of bony fish are indeed lighter than water, this adaptation does not play a significant role in buoyancy regulation.

How Do Bony Fish Regulate Buoyancy