It is correct to say that the yellow croaker can use the stones in its head to keep its body balanced.

The stone in the head of the yellow croaker is an otolith. The otolith is the functional equivalent of a human ear, which not only produces hearing, but also has the function of regulating the balance of the body, making it an important organ of the fish. The otoliths play a role in the fish's ability to maintain body balance. The otoliths press on the sensory cells, helping the fish to adjust its body and maintain balance. The otolith of the yellow croaker can be used as medicine, called "fish brain stone".

The reason there are stones in the head of the yellow croaker

Because the two small stones are otoliths, which play a role in conveying sound waves and keeping the fish's body in balance. Therefore, the yellow croaker can hear the movement around it and detect the enemy.

The otoliths have the function of regulating the balance of the body, and when the fish moves, the lymphatic fluid in the inner ear moves, and the otoliths are deflected, which stimulates the sensory hairs.