Ecoregions
| ID | Realm | Major Habitat Type | Ecoregion |
|---|---|---|---|
| 101 | Nearctic | Polar freshwaters | Alaskan Coastal |
| 102 | Nearctic | Polar freshwaters | Upper Yukon |
| 103 | Nearctic | Temperate coastal rivers | Alaska & Canada Pacific Coastal |
| 104 | Nearctic | Temperate floodplain rivers and wetlands | Upper Mackenzie |
| 105 | Nearctic | Polar freshwaters | Lower Mackenzie |
| 106 | Nearctic | Polar freshwaters | Central Arctic Coastal |
| 107 | Nearctic | Temperate upland rivers | Upper Saskatchewan |
| 108 | Nearctic | Temperate upland rivers | Middle Saskatchewan |
| 109 | Nearctic | Large lakes | English - Winnipeg Lakes |
| 110 | Nearctic | Temperate coastal rivers | Southern Hudson Bay |
| 111 | Nearctic | Polar freshwaters | Western Hudson Bay |
| 112 | Nearctic | Polar freshwaters | Canadian Arctic Archipelago |
| 113 | Nearctic | Temperate coastal rivers | Eastern Hudson Bay - Ungava |
| 114 | Nearctic | Temperate coastal rivers | Gulf of St.Lawrence Coastal Drainages |
| 115 | Nearctic | Temperate coastal rivers | Canadian Atlantic Islands |