Coregonus is a genus of freshwater fish commonly known as whitefish. They are primarily found in cold lakes and rivers in North America, Europe, and Asia. These fish are characterized by their elongated bodies, forked tails, and silvery scales, which help them blend into their aquatic environments. There are several species within the Coregonus genus, including the Coregonus clupeaformis, or lake whitefish, and the Coregonus lavaretus, known as the European whitefish. These fish are important for both commercial and recreational fishing, and they play a significant role in the ecosystems of the waters they inhabit.