Ecoregions
| ID | Realm | Major Habitat Type | Ecoregion |
|---|---|---|---|
| 451 | Palearctic | Temperate coastal rivers | Northern Hormuz Drainages |
| 452 | Palearctic | Large lakes | Caspian Marine |
| 453 | Palearctic | Large lakes | Volga Delta - Northern Caspian Drainages |
| 501 | Palearctic | Temperate coastal rivers | Atlantic Northwest Africa |
| 502 | Palearctic | Temperate coastal rivers | Mediterranean Northwest Africa |
| 503 | Palearctic | Xeric freshwaters and endorheic (closed) basins | Sahara |
| 504 | Palearctic | Xeric freshwaters and endorheic (closed) basins | Dry Sahel |
| 505 | Afrotropic | Tropical and subtropical floodplain rivers and wetland complexes | Lower Niger - Benue |
| 506 | Afrotropic | large river deltas | Niger Delta |
| 507 | Afrotropic | Tropical and subtropical upland rivers | Upper Niger |
| 508 | Afrotropic | Tropical and subtropical floodplain rivers and wetland complexes | Inner Niger Delta |
| 509 | Afrotropic | Tropical and subtropical floodplain rivers and wetland complexes | Senegal - Gambia |
| 510 | Afrotropic | Montane freshwaters | Fouta - Djalon |
| 511 | Afrotropic | Tropical and subtropical coastal rivers | Northern Upper Guinea |
| 512 | Afrotropic | Tropical and subtropical coastal rivers | Southern Upper Guinea |