A shark that lives to 500 years old and a whale that looks like a swimming unicorn could join the polar bear as symbols of the threat to the Arctic ecosystem.
Pen Hadow, the explorer, who will attempt to sail from Alaska to the North Pole next month, said it was time for the world to wake up to the importance of protecting the region’s underwater mysteries.
His expedition will highlight climate change and study the “teeming” ocean wildlife now threatened as the protective pack ice recedes.
The narwhal whale, likened to a swimming unicorn because its tusk can grow to 9ft long, has adapted to the profound darkness of the Arctic winter, and ice cover, by navigating by sound rather than sight.
It can
