Wednesday 11 February on BBC One at 9pm
The BBC Natural History Unit have done it again and have managed to capture "never before seen footage" of the narwhal, (often called the arctic unicorn due to its unique spiral tusk which is actually an extended tooth! The BBC filmed the whales during their summer migration, as they navigated through cracks in the melting Arctic sea ice.
The team believes this aerial footage, which forms part of the BBC Natural History Unit's new series Nature's Great Events, is the first of its kind.
"The Great Melt" episode documents the summer melt of Arctic ice, opening up nearly three million square miles of ocean and land, provides opportunities for millions of animals, including beluga whales, families of Arctic foxes, vast colonies of seabirds, and the fabled Arctic unicorn, the narwhal.
Click here for a sneak preview of the incredible Narwal sequence.