Stuart McDonald, Co-Founder of Australian company Travelfish, told Business Insider: "I hired a boat in Baranusa for the two hour trip out to the uninhabited island of Pulau Lapang. Within minutes of dropping over the edge into the fast-flowing crystal waters, I'd seen an Eagle Ray, turtle, and a fast school of tuna all above a healthy, vibrant coral reef. There probably wasn't another snorkeller within 30km of me."