| Name | Description |
| USGS | Nonindigenous Aquatic Species |
| BSASD | Baltic Sea Alien Species Database |
| NOBANIS | North European and Baltic Network on Invasive Alien Species |
| ISB | Invasive Species of Belgium |
| ASP | Alien Species in Poland |
| DIAS | FAO's Database on Introductions of Aquatic Species |
| NOBANIS | North European and Baltic Network on Invasive Alien Species |