| # | Species | Year | Period | From - To | Reason | Established in the wild | Ref. no. |
| 1 | Dreissena polymorpha | 1993 | 1975-present | Ponto-Caspian region - Fresh and brackish waters of Ireland | biofouling | yes | 074339 |
| 2 | Pontastacus leptodactylus | 1988 | 1975-present | Anzali Lagoon - Arass water reservoir | aquaculture | yes | 126950 |