An “undesirable” exotic fish which can grow to 10kg has turned up in Lake Dunstan after likely escaping ponds near Queenstown.
Otago Fish & Game Central Otago is asking anglers to be on the lookout and report any sightings after a grass carp was caught recently in the lake.
Operations manager David Priest said it was suspected that the carp came from authorised releases into contained ponds.
It had possibly escaped during spring floods into Lake Hayes and swum down the Kawarau River into Lake Dunstan.
While it was unlikely the carp could breed, there was a risk of them spreading disease.