freshwater ecoregions
   Northern Asia
     601 (Freshwater ecoregion) Irgyz-Turgai (Palearctic)
     602 (Freshwater ecoregion) Ob (Palearctic)
     603 (Freshwater ecoregion) Upper Irtysh (Palearctic)
     604 (Freshwater ecoregion) Chuya (Palearctic)
     605 (Freshwater ecoregion) Yenisei (Palearctic)
     606 (Freshwater ecoregion) Lake Baikal (Palearctic)
     607 (Freshwater ecoregion) Taimyr (Palearctic)
     608 (Freshwater ecoregion) Lena (Palearctic)
     609 (Freshwater ecoregion) Kolyma (Palearctic)
     610 (Freshwater ecoregion) Anadyr (Palearctic)
     611 (Freshwater ecoregion) East Chukotka (Palearctic)
     612 (Freshwater ecoregion) Koryakia (Palearctic)
     613 (Freshwater ecoregion) Kamchatka and Northern Kurils (Palearctic)
     614 (Freshwater ecoregion) Okhotsk Coast (Palearctic)
     615 (Freshwater ecoregion) Coastal Amur (Palearctic)
     616 (Freshwater ecoregion) Lower Amur (Palearctic)
     617 (Freshwater ecoregion) Middle Amur (Palearctic)
     618 (Freshwater ecoregion) Argun (Palearctic)
     619 (Freshwater ecoregion) Shilka (Amur) (Palearctic)
     620 (Freshwater ecoregion) Songhua Jiang (Palearctic)
     621 (Freshwater ecoregion) Inner Mongolia Endorheic Basins (Palearctic)
     622 (Freshwater ecoregion) Western Mongolia (Palearctic)
     623 (Freshwater ecoregion) Dzungaria (Palearctic)
     624 (Freshwater ecoregion) Balkash-Alakul (Palearctic)
     625 (Freshwater ecoregion) Tarim (Palearctic)
     626 (Freshwater ecoregion) Lower and Middle Syr Darya (Palearctic)
     627 (Freshwater ecoregion) Lake Issyk Kul-Upper Chu (Palearctic)
     628 (Freshwater ecoregion) Northern Central Asian Highlands (Palearctic)
     629 (Freshwater ecoregion) Aral Sea Drainages (Palearctic)
     630 (Freshwater ecoregion) Middle Amu Darya (Palearctic)
     631 (Freshwater ecoregion) Upper Amu Darya (Palearctic)
     632 (Freshwater ecoregion) Qaidan (Palearctic)
     633 (Freshwater ecoregion) Upper Huang He (Palearctic)
     634 (Freshwater ecoregion) Upper Huang He Corridor (Palearctic)
     635 (Freshwater ecoregion) Huang He Great Bend (Palearctic)
     636 (Freshwater ecoregion) Lower Huang He (Palearctic)
     637 (Freshwater ecoregion) Liao He (Palearctic)
     638 (Freshwater ecoregion) Eastern Yellow Sea Drainages (Palearctic)
     639 (Freshwater ecoregion) Southeastern Korean Peninsula (Palearctic)
     640 (Freshwater ecoregion) Hamgyong - Sanmaek (Palearctic)
     641 (Freshwater ecoregion) Sakhalin, Hokkaido, and Sikhote-Alin Coast (Palearctic)
     642 (Freshwater ecoregion) Honshu-Shikoku-Kyushu (Palearctic)
     643 (Freshwater ecoregion) Biwa Ko (Palearctic)