Coriolis forces as driving forces in swimming sea animals

The main method of swimming of marine animals is the lateral oscillation of parts of their body. In this case, a longitudinal current arises along the body, dragging the animal’s body in a direction perpendicular to these vibrations. The mass forces in such a flow are Coriolis forces. The energy delivered by these forces far exceeds the energy expended by animals to create their own transverse vibrations. This energy allows animals to swim almost continuously and quickly, overcoming the resistance of the water. The source of energy is the Earth's gravitational field.