Rudd from DOC eradication
Freshwater ecosystems are vulnerable to invasion by pests and weeds because it is very hard to detect them until they are a problem. In recent years there has been a rapid expansion of some species of introduced freshwater fish.
Once pest fish have invaded a waterway and become established it is very difficult to remove them because they are able to spread through a whole river catchment. It is very important to prevent pest fish from invading into places where they aren’t already.
Did you know there are 22 known introduced fish species in New Zealand? Learn about the impact of pest fish on our freshwater ecosystems.
Find out how pest fish upset the balance of New Zealand's freshwater ecosystems and threaten our native fish populations.
DOC has a programme of survey, education, signage and, in some situations, eradication of pest fish where possible.
Discover how you can help stop the spread of pest fish and other aquatic pests in this section.
Pest fish present a huge problem to our fresh waterways as they suffocate native water plants and animals. Learn about some of the worst offenders and why they’re such a problem.
Stop the spread of freshwater pests
Fish and Game New Zealand website
Ministry of Fisheries website
Phone 0800 DOC HOTline (0800 362 468) 24 hour emergency number to report:
Sick or injured wildlifeWhale or dolphin strandings