Redfin is a medium sized freshwater fish native to northern Europe. Redfin were first introduced to Australia in the 1860s for angling, and are now widespread across much of NSW, ACT, Victoria, Tasmania, south-eastern South Australia and the south-western corner of Western Australia.
Redfin are popular with some anglers because of their fighting qualities and taste. However, they are also voracious predators of other fish and invertebrates, can destroy recreational fisheries in enclosed waters by building up large numbers of stunted fish and eliminating other species, and can devastate native fish populations by carrying the EHN virus. For these reasons, redfin are considered a serious pest in NSW.