What organ, packed with low-density oils, serves as the primary mechanism for shark buoyancy?

Answer

Massive livers

Sharks rely on massive livers, which contain oils, to counteract sinking and provide the primary hydrostatic mechanism for staying afloat, as they lack a swim bladder.

What organ, packed with low-density oils, serves as the primary mechanism for shark buoyancy?
anatomybodyFeaturecharacteristicshark