The underwater film was shot by biologist Armiche Ramos and brothers Armando and Francisco del Rosario, who used their expertise in freediving to create the illusion. No computer graphics were involved in the production, with the team relying solely on their own skills – and a few hidden secrets. The trio, known as the Ocean Brothers, created the footage for underwater photography competition World Shoot Out, where it was awarded the prize for best short film. The footage was shot over three years in El Hierro, which is the smallest of the Canary Islands. But there were a few hitches, including postponing filming for a year because of an active underwater volcano.