Gammarus (genus)

Gammarus is a genus of small, aquatic crustaceans belonging to the amphipod family. They are typically found in freshwater and marine environments, such as rivers, streams, and lakes. Gammarus species play an important role in aquatic ecosystems by recycling organic matter and serving as food for fish and other wildlife. They have a laterally compressed body, multiple segments, and appendages adapted for crawling and feeding. These organisms are often used in ecological studies to assess water quality because they are sensitive to pollution levels. Overall, Gammarus species are key contributors to the health and balance of aquatic habitats.