Tinca tinca


Family: Cyprinidae

Origin: Europe

Two tenches swimming side by side with their brown scales and black fins.
Tench have ability to survive in poorly oxygenated water where other fish would die.
Photo credit: Karul Jabec

Regional Pest Management Plan (RPMP) status

  • Aotea — Exclusion
  • Priority Lakes Tomarata and Rototoa
  • Whole region — Sustained control
  • Hauraki Gulf Controlled Area Notice pest

View more about the RPMP statuses

General description

Olive green-bronze fish (30-70 cm) with red eyes, two barbels, large soft-rayed fins and copious mucous.

What you need to know

To help protect our environment:


Soft substrates of still or slow-moving waterbodies, lakes, ponds.

Impact on environment

Can cause flipping of lakes to alternative turbid state devoid of vegetation through uprooting submerged macrophytes, re-suspending sediment and exacerbating algal blooms by consuming zooplankton. Impacts native fish species through transmission of parasites, competition for prey and reduction of water clarity.



Check equipment and vessels for freshwater pests, clean everything that has been in contact with the water and dry everything thoroughly.

For more information about tench and how to manage them, please contact Auckland Council at pestfree@aucklandcouncil.govt.nz.