The Cauvery Rasbora is a small freshwater fish native to Sri Lanka and the Indian subcontinent. In Sri Lanka, it is found in rivers, streams, and other freshwater habitats with clear water, gentle currents, and aquatic vegetation. This active schooling fish has a slender body adapted for quick swimming and is usually found in groups among submerged plants and shallow stream areas. It feeds on small insects, insect larvae, plankton, tiny crustaceans, and other small aquatic organisms. The Cauvery Rasbora contributes to the biodiversity of Sri Lanka’s freshwater ecosystems and plays a role in aquatic food chains as both a small predator and prey species.