Esox Masquinongy is a species of freshwater fish that is commonly known as the muskellunge or musky. This species is highly sought after by anglers for its size, strength, and fighting ability. The musky is native to North America and can be found in a variety of habitats, including lakes, rivers, and streams. There are several synonyms for Esox Masquinongy, including muskie, muskellunge, and maskinonge. These terms are frequently used interchangeably and refer to the same fish species. Despite its popularity as a game fish, the musky's population has declined in some areas due to overfishing and habitat destruction.