Carp numbers across northern NSW waterways are again raising alarm, with the invasive fish undermining river health, native species recovery and water quality across the Barwon, Namoi and Gwydir systems.
Recent community catches, including hundreds of kilograms taken from single stretches of the Namoi and Barwon, show how quickly carp can dominate a system after ideal spawning conditions.
River advocacy groups, including Speak Up for Water, have long argued that carp have become one of the clearest indicators of an unhealthy Murray–Darling Basin…