It is [yú biào].

The swim bladder, commonly known as the fish bubble, is the regulator of the depth of the water when the fish swims, but also the fish swims in the "life buoy", which can be inflated and deflated to regulate the specific gravity of the fish body. In this way, the fish only need a minimum of muscle activity when swimming, will be able to maintain a stable state in the water without sinking or floating.

The white, sac-like organ in the fish's abdomen. The expansion and contraction of the swim bladder regulates the floating and sinking of the body. The swim bladder can be used to make glue.

Medicinal value:

It has been proved that collagen-rich foods can affect the physiological functions of certain specific tissues through the collagen-containing binding water, thus promoting growth and development, enhancing resistance to disease, and playing a role in slowing down the aging process and resisting cancer.

The use of swim bladder with traditional Chinese medicine can treat peptic ulcer, tuberculosis, rheumatic heart disease, aplastic anemia and vasculitis and other disorders.

The bionic use of swim bladderThe biological macromolecule collagen protein contained in swim bladder is the raw material for human body to replenish and synthesize protein, and it is easy to be absorbed and utilized. It is stored in the form of aqueous solution in human tissues, thus improving the nutritional status and metabolism of the tissues.