The Narwhal is a medium-sized toothed whale that lives year-round in the Arctic. In medival times, it was thought that Narwal horns had magical powers. The signature long horn of the narwhal inspired unicorns.
Narwhal males are distinguished by a long, straight, helical tusk, actually an elongated upper left canine.
Additional items found in stomachs have included wolffish, capelin, skate eggs and sometimes rocks, accidentally ingested when whales feed near the bottom.