The pike belongs to salmoniformes, pike family and pike family. Barracuda nigromaculata Commonly known as dog fish and duck fish. Pike is a kind of freshwater fish, which is widely distributed in cold and temperate regions of the northern hemisphere. The mouth is large and flat, like a duckbill, with a prominent jaw. It is the roughest carnivorous fish among freshwater fish. Besides attacking other fish, it will attack frogs, mice or wild ducks. It is said that you can eat food equivalent to your own weight a day. Because of its long life span, giant individuals can be found occasionally. Because meat tastes very good, it becomes a good target for fishing. Dog fish has the functions of calming nerves, protecting eyesight, strengthening tendons and bones. Because it is rich in vitamins, it can maintain the function of nerve cells and relieve the discomfort caused by various eye diseases. In addition, it can promote bone growth and prevent osteoporosis. Moreover, its nutritional value is relatively high, which is more suitable for people with malnutrition. Dog fish has fewer taboos, so people who are allergic to seafood should not eat it.