I went to Nosy Tanikely yesterday for a snorkel in the national park. The whole island is the centre of marine reserve but the scuba diving is certainly much better than the snorkelling. However, in saying that I managed to get some great video with my Gopro of a turtle feeding and then coming to the surface to get some air. This is Hawksbill turtle and there were two of them within 20 feet of each other happily feeding and showing little concern for any of the tourists. They are capable of holding their breath for about 30 minutes before they need to surface for air so I had to follow this one around to get the video when he felt like surfacing.