Coregonus autumnalis, commonly known as the Arctic cisco, is a species of fish belonging to the family Salmonidae. It is primarily found in the cold waters of the Arctic and sub-Arctic regions, including parts of North America and Greenland. This fish is known for its slender body and silvery coloration, which helps it blend into its aquatic environment. The Arctic cisco typically inhabits rivers, lakes, and coastal areas, where it feeds on zooplankton and small invertebrates. It plays a crucial role in the ecosystem as both a predator and prey, supporting various wildlife, including birds and larger fish species.