Anthony Boxshall and Kade Mills are joined by a group of teen marine ambassadors, Marine Biologist Researcher Dr Joana Ferreira Costa and author James Bradley. The teen ambassadors explain how spending their school holidays underwater has influenced their passion for the ocean and how we can help protect it. Dr Costa explores the role of corals in the efforts to cure malaria. Bradley discusses his recent book about the deep sea: Deep Water: The World In The Ocean.