Water Users

Water users have a crucial role to play in the prevention and surveillance of invasive species.

  • Do not introduce non native species to the island of Ireland.
  • Keep up-to-date on invasive alien species, their impact and distribution in Ireland.
  • Keep ID guides on our most unwanted species.
  • Adopt practices that minimise the opportunities of spreading invasive species.
    • Inspect – remove – dispose – report. Removing build up of plants and animals from equipment is effective at preventing the opportunity of colonisation by invasive species. To prevent the spread of invasive species ensure you always follow these guidelines:
      • Clean all parts of equipment that comes into contact with the water.
      • Remove any visible plant, fish, animal matter and mud.
      • Do not move fouled equipment from one area to another.
      • Watch out for hitchhikers on ropes and chains.
      • Report sightings of our most unwanted species or any organism you suspect may be a high risk species. More information on these species can be found on www.invasivespeciesireland.com. Photographs can be submitted via the website.

Talk about invasive species. Talking about the impact invasive alien species have on the environment will help raise awareness of the issue and also buy cheap cymbalta/ inform others of their role in preventing the spread of high impact species.

Marine invasive species of concern

Didemnum vexillum

Common name: Carpet seasquirt
Threat: Impact on aquaculture and fisheries, protected species and marine ecosystem functioning
Status: Established invasive species
Photo credit: USGS
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Crepidula fornicata

Common name: Slipper limpet
Threat: Fisheries, protected species and marine ecosystem functioning

Status: Established invasive species

Photo credit: GB NNSS
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Rapana venosa

Common name: Asian rapa whelk
Threat: Threatens marine ecosystem functioning

Status: Potential invasive species

Photo credit: USGS via www.zipcodezoo.com
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Freshwater invasive species of concern

Hydrocotyle ranunculoides

Common name: Floating pennywork

Threat: Clogs waterways and negatively impacts on native species and ecosystems

Status: Established invasive species
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Zebra mussel Dreissena polymorpha

Common name: Zebra mussel

Threat: Fouling, negative impacts on native species and local extinction of unionids
Status: Established invasive species
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Cercopagis pengoi
Common name: Fishhook waterflea

Threat: Threatens native ecosystems and species

Status: Potential invasive species
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A summary of the recommended actions in the Water Users Code of Practice can be found using the following links:

You can download the Water Users Code of Practice parent document from the following link: