The traditional livelihoods of the Pomor based on the sea included animal hunting, whaling and fishing; in tundra regions they practiced reindeer herding. The Pomor traded by sea in corn and fish with Northern Norway, which became important to both sides. This trade was so intensive that a kind of Russian-Norwegian pidgin language Moja på tvoja (or Russenorsk) developed on the North Norwegian coast that was used from 1750–1920.[3]