A dead carp spotted in Tasmania's Lake Crescent in 1995 triggered a 28-year campaign to eradicate invasive European carp from Lake Crescent and Lake Sorell. Authorities removed 49,301 carp using radio-tagged “Judas fish”, nets, electrofishing and genetic testing. By 2025, surveys found no remaining carp, allowing officials to declare the invasive species functionally eradicated and paving the way for the lakes' native ecosystem to recover.

An intensive 28-year eradication campaign has eliminated common carp from two major Tasmanian lakes, achieving what fisheries experts around the world once considered almost…

A dead carp spotted in Tasmania's Lake Crescent in 1995 triggered a 28-year campaign to eradicate invasive European carp from Lake Crescent and Lake Sorell. Authorities removed…