Esox Niger is a scientific name for a species of freshwater fish commonly known as the Chain Pickerel. This predatory fish is native to eastern North America and is characterized by its chain-like markings on its sides. When it comes to synonyms for Esox Niger, the term "Pickerel" is widely used, while some people also refer to it as "Jackfish" or "Pike." These names are interchangeably used for different species of the Esox genus, but they all refer to the same type of fish. Additionally, the term "water wolf" is used to describe this species due to its predatory nature and sharp teeth. Regardless of the term used, Esox Niger is a fascinating fish species worth exploring.