hyderabad looks like the negative impact of the ap governments ambitious riverlinking project is fast showing up the devil fishwhich made its way into the prakasam barrage across river krishna in vijayawada from godavari through the muchtalked about pattiseema lift scheme has now invaded the nagarjunasagar ns reservoira devil fish was caught by a farmer from an agricultural well at pedakurapadu village in guntur district on sunday since pedakurapadu is not served by the prakasam barrage it is unlikely that the exotic fish may have entered the village from vijayawada the area is served by nagarjunasagar right bank canal and the fish may have made its way into pedakurapadu from the ns dam it is suspectedexperts warn that the devil fish may soon spread to srisailam reservoir upstream of nagarjunasagar dam across the krishna from there the fish may enter into other rivers including tungabhadra pennar and musi as they are already interlinked it may also damage the delicate ecosystem in all the water bodies en route as andhra pradesh and telangana have an intricate network of irrigation and drinking water channels that spread over thousands of kilometres the alien invasive fish has thus far been limited to godavari cauvery and a few pockets in india it entered the krishna riverine ecosystem earlier this year after the inauguration of the pattiseema scheme the devil fish also known as sucker catfish belong to the genera pterygoplichthys and hypostomus of the armed catfish groupalien invasive species are always dangerous they fight for space and food with other aquatic fauna and kill the delicate ecosystem making it difficult for the native ones to survive every ecosystem has its own predators the entry of a new predator will lead to unpredictable changes as there will be none to feed on the new entrant said senior zoologist dr duggaraju srinivasa rao