The Ungava Inuit occupy the Québec-Labrador Peninsula north of the tree line and live along the coastline of the Hudson Strait, Ungava Bay and the eastern shores of the Hudson Bay, including the Belcher Islands. The terrain is one of rolling, rocky outcrops, shallow ponds, and some abrupt cliff faces. The subarctic vegetation of grasses and willows supports a migratory caribou population, whose numbers fluctuate dramatically and greatly affect Inuit life. In addition to caribou, the Ungava Inuit rely upon other land-based mammals like the arctic hare, arctic fox, wolf and ptarmigan. The lakes have large numbers and many kinds of fish. Coastal areas support ringed seal, bearded seal, walrus, beluga, polar bears and waterfowl as well as sea urchins, sea cucumbers and mussels. All of this provides the population with a great variety in diet and resources.