freshwater ecoregions
   Africa and Madagascar
     501 (Freshwater ecoregion) Atlantic Northwest Africa (Palearctic)
     502 (Freshwater ecoregion) Mediterranean Northwest Africa (Palearctic)
     503 (Freshwater ecoregion) Sahara (Palearctic)
     504 (Freshwater ecoregion) Dry Sahel (Palearctic)
     505 (Freshwater ecoregion) Lower Niger-Benue (Afrotropic)
     506 (Freshwater ecoregion) Niger Delta (Afrotropic)
     507 (Freshwater ecoregion) Upper Niger (Afrotropic)
     508 (Freshwater ecoregion) Inner Niger Delta (Afrotropic)
     509 (Freshwater ecoregion) Senegal-Gambia (Afrotropic)
     510 (Freshwater ecoregion) Fouta-Djalon (Afrotropic)
     511 (Freshwater ecoregion) Northern Upper Guinea (Afrotropic)
     512 (Freshwater ecoregion) Southern Upper Guinea (Afrotropic)
     513 (Freshwater ecoregion) Mount Nimba (Afrotropic)
     514 (Freshwater ecoregion) Eburneo (Afrotropic)
     515 (Freshwater ecoregion) Ashanti (Afrotropic)
     516 (Freshwater ecoregion) Volta (Afrotropic)
     517 (Freshwater ecoregion) Bight Drainages (Afrotropic)
     518 (Freshwater ecoregion) Northern Gulf of Guinea Drainages-Bioko (Afrotropic)
     519 (Freshwater ecoregion) Western Equatorial Crater Lakes (Afrotropic)
     520 (Freshwater ecoregion) Lake Chad (Afrotropic)
     521 (Freshwater ecoregion) Lake Victoria Basin (Afrotropic)
     522 (Freshwater ecoregion) Upper Nile (Afrotropic)
     523 (Freshwater ecoregion) Lower Nile (Palearctic)
     524 (Freshwater ecoregion) Nile Delta (Palearctic)
     525 (Freshwater ecoregion) Ethiopian Highlands (Afrotropic)
     526 (Freshwater ecoregion) Lake Tana (Afrotropic)
     527 (Freshwater ecoregion) Western Red Sea Drainages (Palearctic)
     528 (Freshwater ecoregion) Northern Eastern Rift (Afrotropic)
     529 (Freshwater ecoregion) Horn of Africa (Afrotropic)
     530 (Freshwater ecoregion) Lake Turkana (Afrotropic)
     531 (Freshwater ecoregion) Shebelle-Juba (Afrotropic)
     532 (Freshwater ecoregion) Ogooue-Nyanga-Kouilou-Niari (Afrotropic)
     533 (Freshwater ecoregion) Southern Gulf of Guinea Drainages (Afrotropic)
     534 (Freshwater ecoregion) Sangha (Afrotropic)
     535 (Freshwater ecoregion) Sudanic Congo-Oubangi (Afrotropic)
     536 (Freshwater ecoregion) Uele (Afrotropic)
     537 (Freshwater ecoregion) Cuvette Centrale (Afrotropic)
     538 (Freshwater ecoregion) Tumba (Afrotropic)
     539 (Freshwater ecoregion) Upper Congo Rapids (Afrotropic)
     540 (Freshwater ecoregion) Upper Congo (Afrotropic)
     541 (Freshwater ecoregion) Albertine Highlands (Afrotropic)
     542 (Freshwater ecoregion) Lake Tanganyika (Afrotropic)
     543 (Freshwater ecoregion) Malagarasi-Moyowosi (Afrotropic)
     544 (Freshwater ecoregion) Bangweulu-Mweru (Afrotropic)
     545 (Freshwater ecoregion) Upper Lualaba (Afrotropic)
     546 (Freshwater ecoregion) Kasai (Afrotropic)
     547 (Freshwater ecoregion) Mai Ndombe (Afrotropic)
     548 (Freshwater ecoregion) Malebo Pool (Afrotropic)
     549 (Freshwater ecoregion) Lower Congo Rapids (Afrotropic)
     550 (Freshwater ecoregion) Lower Congo (Afrotropic)
     551 (Freshwater ecoregion) Cuanza (Afrotropic)
     552 (Freshwater ecoregion) Namib (Afrotropic)
     553 (Freshwater ecoregion) Etosha (Afrotropic)
     554 (Freshwater ecoregion) Karstveld Sink Holes (Afrotropic)
     555 (Freshwater ecoregion) Zambezian Headwaters (Afrotropic)
     556 (Freshwater ecoregion) Upper Zambezi Floodplains (Afrotropic)
     557 (Freshwater ecoregion) Kafue (Afrotropic)
     558 (Freshwater ecoregion) Middle Zambezi-Luangwa (Afrotropic)
     559 (Freshwater ecoregion) Lake Malawi (Afrotropic)
     560 (Freshwater ecoregion) Zambezian Highveld (Afrotropic)
     561 (Freshwater ecoregion) Lower Zambezi (Afrotropic)
     562 (Freshwater ecoregion) Mulanje (Afrotropic)
     563 (Freshwater ecoregion) Eastern Zimbabwe Highlands (Afrotropic)
     564 (Freshwater ecoregion) Coastal East Africa (Afrotropic)
     565 (Freshwater ecoregion) Lake Rukwa (Afrotropic)
     566 (Freshwater ecoregion) Southern Eastern Rift (Afrotropic)
     567 (Freshwater ecoregion) Tana, Athi, and Coastal Drainages (Afrotropic)
     568 (Freshwater ecoregion) Pangani (Afrotropic)
     569 (Freshwater ecoregion) Okavango (Afrotropic)
     570 (Freshwater ecoregion) Kalahari (Afrotropic)
     571 (Freshwater ecoregion) Southern Kalahari (Afrotropic)
     572 (Freshwater ecoregion) Western Orange (Afrotropic)
     573 (Freshwater ecoregion) Karoo (Afrotropic)
     574 (Freshwater ecoregion) Drakensberg-Maloti Highlands (Afrotropic)
     575 (Freshwater ecoregion) Southern Temperate Highveld (Afrotropic)
     576 (Freshwater ecoregion) Zambezian Lowveld (Afrotropic)
     577 (Freshwater ecoregion) Amatolo-Winterberg Highlands (Afrotropic)
     578 (Freshwater ecoregion) Cape Fold (Afrotropic)
     579 (Freshwater ecoregion) Western Madagascar (Afrotropic)
     580 (Freshwater ecoregion) Northwestern Madagascar (Afrotropic)
     581 (Freshwater ecoregion) Madagascar Eastern Highlands (Afrotropic)
     582 (Freshwater ecoregion) Southern Madagascar (Afrotropic)
     583 (Freshwater ecoregion) Madagascar Eastern Lowlands (Afrotropic)
     584 (Freshwater ecoregion) Comoros-Mayotte (Afrotropic)
     585 (Freshwater ecoregion) Seychelles (Afrotropic)
     586 (Freshwater ecoregion) Mascarenes (Afrotropic)
     587 (Freshwater ecoregion) S. Tome and Principe-Annobon (Afrotropic)