FOLLOW MLS of narwhal surfacing to breathe, moving from right to left along floe edge, animal fluking up on last shot with towering iceberg in background (2:49). MLS of large flat ice floe drifting off floe edge (3:00). FOLLOW MS of narwhal surfacing to breathe, moving from right to left along floe edge, shot of it resting on surface, breathing and resumes swimming again, tusk and tail visible on last dive (5:12).