MLS of narwhal busting through water's surface. MS of trapped narwhals bobbing for air. MLS of narwhals bobbing for air. MCU of narwhal descending into water. MLS MCU of narwhal bobbing for air. LS of ice shifting. MLS of narwhal escaping ice. UNDERWATER LS of narwhal swimming. LS of narwhal swimming along icy river. (213)