Travancoria elongata, which is also known as Periyar loach, (മലയാളം: നെടും കൽനക്കി) is an endangered species of freshwater fish only found in Chalakudy River and Periyar River,[1] from the family of Balitoridae(River loaches).[2] These fishes grows up to 11cm (04inches) long. Large-scale capture of these species from rivers in order to export them to the international market as ornamental fish has become a threat to this species. Included in the Red Data Book, they are on the verge of extinction.