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Quagga Mussel: Invasive Species Detected in NI for First Time

The quagga mussel threatens native species and infrastructure with no current eradication method; officials urge strict biosecurity as it spreads via recreational watercraft.

  • On December 15, 2025, DAERA announced the first confirmed quagga mussel in Lower Lough Erne, Co Fermanagh, after AFBI samples were verified by DNA analysis at Queen's University Belfast.
  • DAERA said the arrival most likely came from a connected invasion along the Shannon–Erne corridor, as quagga mussels native to the Ponto-Caspian region have spread across Western Europe, North America and Mexico.
  • Scientists note quagga mussel occupies more depths than zebra mussel, outcompeting it, and can block infrastructure like water pipes; there is no effective control once established.
  • Officials are identifying other waterways to be checked while DAERA urges strict `Check, Clean, Dry` biosecurity, engaging stakeholders and calling for increased vigilance among water users.
  • DAERA warned quagga mussels can spread rapidly and alter food webs, saying it is plausible they are undetected in Upper Lough Erne while cross-border work continues through the Shared Island Biosecurity and Invasive Species Initiative.
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Vigilance urged as quagga mussel discovered for first time in NI

Quagga mussels originate from Eastern Europe and can threaten native animals and plants.

·London, United Kingdom
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farminglife.com broke the news in on Monday, December 15, 2025.
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