New Zealand flatworm
Arthurdendyus triangulatus
Status:
Established
Habitat:
Terrestrial
Threats:
Significant reduction of native earthworms.
New Zealand pigmyweed
Crassula helmsii
Status:
Established
Habitat:
Freshwater
Threats:
Competition with native species.
North American Signal Crayfish
Pacifastacus leniusculus
Status:
Potential
Habitat:
Freshwater
Threats:
Detrimental impacts on white clawed crayfish. Human health impacts.
Nuttalls waterweed
Elodea nuttallii
Status:
Established
Habitat:
Freshwater
Threats:
Negative impacts on native macrophytes and invertebrates.
Oyster drill
Ceratostoma inornatum and Urosalpinx cinerea
Status:
Potential
Habitat:
Marine
Threats:
Serious impacts on oyster populations.
Pacific or Pink Humpback Salmon
Oncorhynchus gorbuscha
Status:
Established
Habitat:
Freshwater
Threats:
Parrots Feather
Myriophyllum aquaticum
Status:
Established
Habitat:
Freshwater
Threats:
Competition with native macrophytes. Clogging of waterways.
Persian hogweed
Heracleum persicum
Status:
Potential
Habitat:
Terrestrial
Threats:
Ecological damage and a danger of burns to humans
Quagga mussel
Dreissena bugensis
Status:
Potential
Habitat:
Freshwater
Threats:
Fouling, negative impacts on native species and local extinction of unionids.
Invasive Species Ireland

Invasive Species Ireland