Stizostedion lucioperca


Photo Credit: ©GBNNSS
Stizostedion lucioperca
  • Freshwater ecosystems such as rivers and canals

  • Zander a river fish, which can weigh up to 8.5kg (19lb) are similar to pike. Stream lined appearance with total lateral line scales: 80-97. Front dorsal fin is hard lobed and spiked. Second dorsal fin is soft lobed with 18-22 branched rays.

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Origin and Distribution:
  • It originates from Central and Northern Europe.
  • It was released into British waters in 1878, and has now spread through colonisation and illegal introductions to most of the Midlands Canals, the Rivers Avon and Severn and most of East Anglian fens and ditches.

  • This species will compete and predate on native fish species. Zander can potentially cause the collapse of a fishery by removing many of the young fish not allowing them to grow and spawn.
  • Should this species arrive in Ireland, there is potential for the associated introduction of fish diseases and parasites. These impacts may lead to a reduction in the quality of Irish game (salmonid), and potentially coarse fisheries.
  • It will also impact the ecological status of Irish waterbodies under the Water Framework Directive.

How might it get here?
  • Deliberate introduction for sport fishing.

Is it found in Northern Ireland?
  • Not present in Northern Ireland.

Prevent Spread:
  • Do not introduce invasive non-native fish species.
  • Do not move species of fish from one waterbody to another.
  • Do not use live bait in river systems
  • Report all sightings.

You can help by reporting any sightings: @ the Centre for Environmental Data & Recording (CEDaR) - Or via the iRecord App.   For further queries, you can contact the Invasive Non Native Species (INNS) Team in the Northern Ireland Environment Agency on 028 9056 9558 or Email:

Species Related Files:

Invasive Species Ireland

Invasive Species Ireland