How the spermaceti oil of sperm whale maintain the buoyancy?

Spermaceti oil, found in the spermaceti organ of sperm whales, helps maintain buoyancy by adjusting its density based on temperature and pressure changes in the ocean. When the whale dives deeper, the pressure increases, causing the oil to become denser, which aids in sinking. Conversely, as the whale ascends, the oil becomes less dense, helping it to rise. This unique property allows sperm whales to efficiently control their buoyancy during deep dives.