The Brown Trout (Salmo trutta) is a freshwater species from the family Salmonidae, primarily inhabiting Europe and Asia but introduced to other continents. This species thrives in cool, oxygen-rich rivers and streams with gravel or sandy beds. Known for its adaptability, the Brown Trout is a prized game fish with a diet ranging from aquatic insects to small fish. Its role in aquatic ecosystems includes hosting freshwater pearl mussels and acting as a bio-indicator for environmental health