Chronicles the making of Arrecifes de delfines (2018). From wave surfing with dolphins in South Africa to dancing with humpback whales in Hawaii, filmmakers go to great lengths - and depths - to shed new light on the ocean's mysteries.

Echo, a young Pacific dolphin, seems far more interested in exploring his spectacular coral reef home than learning to survive in it. But lessons from his family may encourage Echo to master his vital role in the marine community.