Indian Ocean

Elliptical in shape, Reunion Island is located in the southern Indian Ocean, 800km east of Madagascar as the crow flies, and 200km west-south-west of Mauritius Island. With a surface of 2,512 sq km and a perimeter of 207km, it is the emerged tip of a volcanic mound that rose 7,000m above the ocean floor. Pierre Constant shares his adventure to this exotic and remote island.

Drifting fish aggregating devices (dFADs) are threatening endangered marine species and coral reefs in the Indian Ocean. Marine conservationist Lucy Martin worked with the Island Conservation Society (ICS), a non-governmental organization in the Seychelles, on a large survey in 2015 to find out how big an issue FADs actually were.

There is just something that always feels right about getting on a small airplane for the final leg of travel to begin a dive trip. In my mind, it almost guarantees the destination is somewhere amazing—a place that is so special that the large jets used in mass transit cannot even get to it.

So here we are. Five divers and I, hanging at a depth of 18m, about 80m from the reef edge over an unfathomably deep drop off, looking at each other. Did that just happen? Did we just have a rather intimate close encounter with the largest fish in the world? Apparently so.

I was not planning to go on the night dive. It was the first night of the trip and I was a little tired, I already had my camera batteries charging and was all settled in with a book for the night after a fabulous first day of diving with turtles, sharks and tons of fish. But Fernando, our dive guide, told me I had to go.

One of the things I value the most about planning specialized wreck diving trips around the world is not only getting an opportunity to dive these sites, but also getting totally immersed in the history and circumstances that put these steel hulks at the bottom of the ocean.

Extending 329 kilometers from north to south, the Andaman and Nicobar Islands have 1,912km of coastline, about a quarter that of India. The continental shelf has a surface area estimated at 16,000km². The coral reef biodiversity here amounts to 5,440 species, 138 of which are endemic.