Terrestrial Regions | FRESHWATER REGIONS | Marine Regions
LARGE RIVERS
143 144 145 146 147 148 149	Afrotropic Congo River and Flooded Forests Indo-Malayan Mekong River Nearctic Colorado River Lower Mississippi River Neotropic Amazon River and Flooded Forests Orinoco River and Flooded Forests Palearctic Yangtze River and Lakes
LARGE RIVER HEADWATERS
150 151 152 153 154	Afrotropic Congo Basin Piedmont Rivers and Streams Nearctic Mississippi Piedmont Rivers and Streams Neotropic Upper Amazon Rivers and Streams Upper Parana Rivers and Streams Brazilian Shield Amazonian Rivers and Streams
LARGE RIVER DELTAS
155 156 157 158 159 160	Afrotropic Niger River Delta Indo-Malayan Indus River Delta Palearctic Volga River Delta Mesopotamian Delta and Marshes Danube River Delta Lena River Delta
SMALL RIVERS
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181	Afrotropic Upper Guinea Rivers and Streams Madagascar Freshwater Gulf of Guinea Rivers and Streams Cape Rivers and Streams Australasia New Guinea Rivers and Streams New Caledonia Rivers and Streams Kimberley Rivers and Streams Southwest Australia Rivers and Streams Eastern Australia Rivers and Streams Indo-Malayan Xi Jiang Rivers and Streams Western Ghats Rivers and Streams Southwestern Sri Lanka Rivers and Streams Salween River Sundaland Rivers and Swamps Nearctic Southeastern Rivers and Streams Pacific Coastal Rivers and Streams Gulf of Alaska Coastal Rivers and Streams Neotropic Guianan Freshwater Greater Antillean Freshwater Palearctic Balkan Rivers and Streams Russian Far East Rivers and Wetlands
LARGE LAKES
182 183 184 185	Afrotropic Rift Valley Lakes Neotropic High Andean Lakes Palearctic Lake Baikal Lake Biwa
SMALL LAKES
186 187 188 189 190 191 192	Afrotropic Cameroonian Crater Lakes Australasia Lakes Kutubu and Sentani Central Sulawesi Lakes Indo-Malayan Philippines Freshwater Lake Inle Yunnan Lakes and Streams Neotropic Mexican Highland Lakes
XERIC BASINS
193 194 195	Australasia Central Australian Freshwater Nearctic Chihuahuan Freshwater Palearctic Anatolian Freshwater