Home / Environment / Invasive Mussels Invade Northern Ireland Waters
Invasive Mussels Invade Northern Ireland Waters
15 Dec, 2025
Summary
- Quagga mussel, an invasive species from Eastern Europe, has been found in Lower Lough Erne.
- The mussel can harm native wildlife, block water pipes, and infect water supplies.
- Biosecurity measures and increased surveillance are critical to slow its spread.
Northern Ireland's freshwater system faces a new threat with the confirmed discovery of the invasive quagga mussel in Lower Lough Erne, County Fermanagh. Originating from Eastern Europe, this species rapidly spreads and can outcompete native mussels, disrupt aquatic ecosystems, and foul water infrastructure. Its arrival marks another significant pressure on the region's already stressed waterways, prompting urgent calls for enhanced biosecurity.
Officials are now working to identify and test other waterways for the presence of quagga mussels, as they can spread through recreational boating, angling, and the transfer of equipment like canoes. The Department of Agriculture, Environment and Rural Affairs highlighted that once established, quagga mussels have no effective control or eradication method. Therefore, strict adherence to biosecurity protocols, such as the 'Check, Clean, Dry' approach, is paramount for slowing their spread.
Scientists from the Agri-Food and Biosciences Institute confirmed the species through DNA analysis. The arrival is likely linked to the Shannon-Erne corridor, suggesting potential presence in intermediate water bodies. The situation underscores the need for heightened surveillance across connected water systems, including Lough Neagh, to mitigate ecological and economic impacts.
