Five years after her last companion died and the aquarium’s owner pledged to free her, Bella still languishes in a tiny tank amid shops

In the heart of Seoul, amid the luxury shops at the foot of the world’s sixth-tallest skyscraper, a lone beluga whale named Bella swims aimlessly in a tiny, lifeless tank, where she has been trapped for a decade.

Her plight is urgent, with campaigners racing to rescue her from the bare tank in a glitzy shopping centre in South Korea’s capital before it is too late.