A disturbing development is afoot in the crystal-clear waters of the Lofoten islands, Norway. Renowned for their pristine beauty, these waters are now facing an unprecedented threat.

On a dive into an embayment near a commercial fish farm, scientist Hartvig Christie encounters a barren seabed with a staggering density of red sea urchins, a species normally found in low numbers in the region's thriving kelp forests.

Christie believes the influx of nutrients from the fish farm is fueling an explosion in the urchin population, threatening to upset the delicate balance of this unique ecosystem.