Cottus is a genus of fish commonly known as sculpins, which belong to the family Cottidae. These fish are typically found in cold, freshwater environments, particularly in North America and parts of Europe. Cottus species are characterized by their flattened bodies and large heads, which help them navigate rocky substrates in rivers and streams. Sculpins are known for their unique adaptations, such as the ability to camouflage with their surroundings. They primarily feed on small invertebrates and are an important part of the aquatic food web. Some species of Cottus are also used as indicators of environmental health in freshwater ecosystems.