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Genetic diversity of Sri Lanka’s ‘spa fish’ highlights need for informed conservation by Malaka Rodrigo on 25 May 2021 An endemic freshwater fish species known as the “stone sucker” (Garra ceylonensis) has six genetically different populations spread in different river basins in Sri Lanka despite managing to sport similar looks, a new study shows. The research estimates that the ancestor of G. ceylonensis first colonized Sri Lanka around 3 million to 4 million years ago via rivers on the land bridge between India and Sri Lanka and that subsequent climatic events trapped them on the island, causing the fish to evolve as a distinct species along with genetic variances.

Sri lankaKirindi oyaSri lankanTharindu ranasingheUma oyaHiranya sudasingheRohan pethiyagodaMadhava meegaskumburaUniversity of peradeniyaSpecies survival commissionInstitute of scienceJournal of the linnean societyPost graduate institutePalk isthmusBiological journalLinnean society