According to Minnan. Com, wild perch usually doesn't open its mouth, but it will open its mouth if it lacks oxygen. Because the fish itself has a great demand for oxygen, it needs enough oxygen in the water. In addition, fish get oxygen in a special way. They alternately open and close their mouths and cheeks. Water enters the oral cavity, passes through the pharynx and reaches the gill cavity, and then is discharged from the body through the gill hole.

Wild perch has the effects of invigorating spleen and stomach, preventing miscarriage and benefiting qi, strengthening brain and improving intelligence. Wild perch contains a lot of trace elements and unsaturated fatty acids, which can maintain the normal function of nervous system, regulate immune system and increase energy metabolism of tissues and cells. It can regulate gastrointestinal function and promote the absorption and digestion of food. It can be used for the adjuvant treatment of symptoms such as restless fetus and postpartum hypogalactia.