Carp
In high densities carp can contribute to increased water turbity, nutrient loads and algal concentrations. They also play a part in erosion of stream banks as well as reductions in the numbers and diversity of aquatic plants, native fish and macro-invertebrates.
Along with habitat degradation, poor water quality, reduced environmental flows and barriers to migration, carp have been identified as a major threat to Australia's freshwater fisheries. They should not be returned to the water alive and strict penalties apply for translocation of carp. Live carp may not be used as bait.
Carp vary from olive green or yellow green to golden overall and have silver to yellow markings on the underside. Mirrored specimens with enlarged silver scales along the sides and back can also be present in wild populations.