New Zealand pigmyweed
Crassula helmsii
Status:
Established
Habitat:
Freshwater
Threats:
Competition with native species.
Nuttalls waterweed
Elodea nuttallii
Status:
Established
Habitat:
Freshwater
Threats:
Negative impacts on native macrophytes and invertebrates.
Pacific or Pink humpback salmon
Oncorhynchus gorbuscha
Status:
Established
Habitat:
Freshwater
Threats:
Has a high reproductive rate. May predate on native plankton, crustaceans and smaller fish.
Parrots feather
Myriophyllum aquaticum
Status:
Established
Habitat:
Freshwater
Threats:
Competition with native macrophytes. Clogging of waterways.
Red-eared, yellow-bellied and Cumberland sliders
Trachemys scripta spp.
Status:
Established
Habitat:
Freshwater
Threats:
It disturbs aquatic habitats and poses a human health risk, being a possible reservoir for salmonella
Water fern
Azolla filiculoides
Status:
Established
Habitat:
Freshwater
Threats:
Reduction of surface light reaching the benthos.
Water soldier
Stratiotes aloides L.
Status:
Established
Habitat:
Freshwater
Threats:
Spreads vegatively. Grows quickly and forms large mats.
Zebra mussel
Dreissena polymorpha
Status:
Established
Habitat:
Freshwater
Threats:
Fouling, negative impacts on native species and local extinction of unionids.
Invasive Species Ireland

Invasive Species Ireland