EPPO Platform
on PRAs

List of aquatic alien species of the Iberian peninsula (2020)


An updated list is presented of the alien species in the establishment or spread invasion stage in inland waters at the Iberian Peninsula. The list is based on a systematic assessment of information in collaboration with a wide expert team from Spain and Portugal. This updated list is an important tool supporting the implementation of the IAS Regulation and provides a factual basis for the review of its application. Ultimately, the information included can be used for monitoring the achievement of the target of the EU Biodiversity Strategy to 2030 for combatting IAS, but also for the implementation of other EU policies with requirements on alien species, such as the Birds and Habitats Directives, and the Marine Strategy and Water Framework Directives.


  • Alternanthera philoxeroides
  • Azolla filiculoides
  • Bacopa monnieri
  • Egeria densa
  • Elodea canadensis
  • Heteranthera limosa
  • Heteranthera reniformis
  • Heteranthera rotundifolia
  • Hydrocharis laevigata
  • Hydrocotyle bonariensis
  • Hydrocotyle verticillata
  • Lagarosiphon major
  • Lemna minuta
  • Lemna valdiviana
  • Ludwigia grandiflora
  • Ludwigia peploides subsp. montevidensis
  • Ludwigia repens
  • Myriophyllum aquaticum
  • Myriophyllum heterophyllum
  • Najas gracillima
  • Najas graminea
  • Nymphaea mexicana
  • Pistia stratiotes
  • Pomacea maculata
  • Pontederia crassipes
  • Spartina alterniflora
  • Spartina densiflora
  • Spartina patens


Type File Size
Pest Risk Analysis Download 6,87MB

PRA Area

  • Portugal
  • Spain