Parasites in eels. Eel belongs to a common aquatic animals, mainly prey on small animals in the water, such as snails, mussels, frogs, etc. These foods carry different degrees of parasite eggs, so eel, especially its internal organs are parasites exist. The parasites infecting eel’s body are mostly nematodes and trematodes, and raw food can infect the human body with the corresponding parasites, which will have a certain impact on human health. Therefore, eels need to be cleaned, gutted and cooked thoroughly to kill the parasites. In addition, the nutritional value of eel is high, rich in protein, calcium, phosphorus, iron, fat and other nutrients, appropriate consumption can be supplemented for the body of the required nutrients to maintain the normal physiological function of the human body. However, it needs to be cooked well and eaten in moderation to avoid causing gastrointestinal reactions such as diarrhea and bloating.