| Name | Description |
| USGS | Nonindigenous Aquatic Species |
| USGS | Nonindigenous Aquatic Species |
| AIB | Aquatic Invaders of Belarus |
| ISC | Invasive Species in Canada |
| DIAS | FAO's Database on Introductions of Aquatic Species |
| DIAS | FAO's Database on Introductions of Aquatic Species |
| NOBANIS | North European and Baltic Network on Invasive Alien Species |