There are eels in Santang River in Changhe Town, Cixi. Eel is an important edible fish and is considered as a healthy food rich in vitamin A and vitamin E. In Santangjiang area of Changhe Town, Cixi, eels used to be a very common fish, and many locals would cast nets to catch eels along the river. However, due to environmental pollution, climate change and other factors, the number of eels has gradually decreased, and it has become an endangered species until June 25, 223. In order to protect eel resources, the local government has taken a series of measures, such as strengthening the management of eel artificial breeding and protecting the habitat of wild eels.