There have been four alien fish species recorded in the cotton growing regions of northern NSW. This represents a third of the alien fish species found throughout the Murray-Darling Basin. The large numbers and often aggressive nature of these species have had a significant impact on native populations causing damage to habitats, increasing competition and predation, and introducing diseases and parasites. Management of alien species needs to focus on reducing these impacts on native fish. The control of these species needs to be part of an integrated aquatic rehabilitation program.
This page contains photos and brief descriptions for the four alien species observed in the region, highlighting the impact these species can have on native fish.
