Ecoregions
| ID | Realm | Major Habitat Type | Ecoregion |
|---|---|---|---|
| 406 | Palearctic | Polar freshwaters | Northern Baltic Drainages |
| 407 | Palearctic | Polar freshwaters | Barents Sea Drainages |
| 408 | Palearctic | Temperate coastal rivers | Southern Baltic Lowlands |
| 409 | Palearctic | Large lakes | Lake Onega - Lake Ladoga |
| 410 | Palearctic | Temperate floodplain rivers and wetlands | Volga - Ural |
| 411 | Palearctic | Xeric freshwaters and endorheic (closed) basins | Western Caspian Drainages |
| 412 | Palearctic | Temperate coastal rivers | Western Iberia |
| 413 | Palearctic | Temperate floodplain rivers and wetlands | Southern Iberia |
| 414 | Palearctic | Temperate floodplain rivers and wetlands | Eastern Iberia |
| 415 | Palearctic | Temperate coastal rivers | Gulf of Venice Drainages |
| 416 | Palearctic | Temperate coastal rivers | Italian Peninsula & Islands |
| 417 | Palearctic | Temperate upland rivers | Upper Danube |
| 418 | Palearctic | Temperate floodplain rivers and wetlands | Dniester - Lower Danube |
| 419 | Palearctic | Temperate coastal rivers | Dalmatia |
| 420 | Palearctic | Temperate coastal rivers | Southeast Adriatic Drainages |