marine ecoregions
   (Biogeographic realm) Arctic
     01 (Marine ecoregion) North Greenland
     02 (Marine ecoregion) North and East Iceland
     03 (Marine ecoregion) East Greenland Shelf
     04 (Marine ecoregion) West Greenland Shelf
     05 (Marine ecoregion) Northern Grand Banks–Southern Labrador
     06 (Marine ecoregion) Northern Labrador
     07 (Marine ecoregion) Baffin Bay–Davis Strait
     08 (Marine ecoregion) Hudson Complex
     09 (Marine ecoregion) Lancaster Sound
     10 (Marine ecoregion) High Arctic Archipelago
     11 (Marine ecoregion) Beaufort–Amundsen–Viscount Melville–Queen Maud
     12 (Marine ecoregion) Beaufort Sea—continental coast and shelf
     13 (Marine ecoregion) Chukchi Sea
     14 (Marine ecoregion) Eastern Bering Sea
     15 (Marine ecoregion) East Siberian Sea
     16 (Marine ecoregion) Laptev Sea
     17 (Marine ecoregion) Kara Sea
     18 (Marine ecoregion) North and East Barents Sea
     19 (Marine ecoregion) White Sea