Discover the beautiful and fascinating unicorn of the sea, the narwhal, with words by a Planet Earth II producer and pictures by an award-winning artist.

"Now the narwhal must begin their epic journey north. It’s a journey with many dangers along the way…" Join us on an icy journey into Arctic waters, as we dive down deep with one of the most enchanting creatures in the world – the narwhal. Learn about how narwhals have adapted to their freezing habitat, how they look after their young and all about their distinctive, mysterious tusks.