Extended distribution of the invasive Sucker catfish Pterygoplichthys pardalis (Pisces: Loricariidae) to Cauvery river system of Peninsular India

This report provides the first record of the exotic sucker fish P. pardalis from the Cauvery River system, Tamilnadu State, India. Information on the assumed presence of this invasive species based on sightings of a hitherto unknown species by local people and fishermen in stretches of Cauvery River has been confirmed by our study. Sailfin sucker fishes are popular among pet traders and aquarists in southeast Asian countries and have been regarded as invaders worldwide. Occurrence of P. pardalis in newer habitats due to its potential invasion in the South Indian waters issues threat to native fauna.