In scuba diving, the ability to maintain neutral buoyancy through controlled breathing is an important skill.

It may have "beached itself" by using an air bladder meant to maintain buoyancy as primitive set of lungs.

It is used as a brood chamber and for trapped surface air to maintain buoyancy.

The guard housed a phragmocone, which allowed Cylindroteuthis to maintain buoyancy in water.

Sailors had to keep pumping pressurized air into the tanks to prevent the water from rising and to maintain buoyancy.

Maintain buoyancy by using thrust to balance the leak.

However elasmobranchs lack swim bladders, and maintain buoyancy instead with large livers that are full of oil.

The inflatable collar allows the vessel to maintain buoyancy even if a large quantity of water is shipped aboard due to bad sea conditions.

Then he adjusted the pressure in his suit with a small squirt of compressed air to maintain neutral buoyancy.