The South Pacific: Marotiri Islands, Austral Islands, French Polynesia – Not just some old rocks

What did you do today? For us, we got up early to sail around some old rocks. Not exciting maybe and you could stop reading here, but these rocks are pretty special. 

Our Captain had been given special permission by the marine authorities to divert from our journey to Mangareva in the Gambier Islands to circumnavigate these old rocks, known by the Polynesians as the Marotiri Islands. Ships visiting the location are extremely rare. Well why would they visit, their craggy nature makes them uninhabitable?

The Marotiri rocks are located within the Austral Islands lying 75 kilometres (about 50 miles) south-east of Rapa Iti where we visited yesterday. These are Polynesia’s most remote islands and lay in the South Pacific Ocean which at this point is 1,500 metres (5,000 feet) deep. Sail south and the next landscape to be seen will be Antarctica.

The islands are also known as the Bass Group. Just why is a puzzle. Some sources consider they are named after George Bass (1771-1803). That seems plausible as Bass was a British naval surgeon and explorer. The Bass Strait between Tasmania and Australia, and other areas, are named after him.

However, I could not find any sources that confirmed his sailing near the Marotiri Islands. More plausible is that a visit could have been based on assumption rather than evidence. His final days are also shrouded in mystery. His last voyage was on the Venus in 1803, heading for Tahiti, but he and his crew were never seen again.

The Marotiri Islands comprise four uninhabited volcanic rocks without surrounding coral reefs. The lower levels of the rocks are without vegetation, but the higher ground does accommodate some grasses and other plant growth.

Just getting to these rocks caused great excitement among many of the naturalists and voyagers on the ship as they are so remote and off the usual shipping routes. Our chief seabird man, Peter Harrison MBE, who has devoted his life to studying seabirds of the world and has received many significant awards for doing so including a Royal Society Gold Medal, the UK’s highest award for conservation, is not unfamiliar with the rocks. 

Since the 1980s he has not only visited here but managed to get onto the rocks to research the bird life and breeding grounds. Just getting onto the rocks is a feat. There aren’t any landing points and such studies involved jumping into the treacherous ocean to then attempt to climb the steep, craggy, slippery volcanic rock, which he and a few others managed to achieve. A group of 56 people signed up to go on the trip at the time in an attempt to get onto the rocks. As an indication of the extreme nature of the climb, only eight managed to land.

The islands are the breeding grounds for many important seabirds including those seen today: the Murphey’s Petrel, Kermadec Petrel, the Christmas Sheerwater, the Red-tailed Tropicbird, Brown Booby and several varieties of the Noddy. Oh crikey I think birding is starting to rub off on me. But of particular note was our sightings of the critically endangered Rapa Sheerwater and the endangered Polynesian Storm Petrel. Rather a pity I didn’t get some good shots of these rare birds as I stared in awe of these ragged rocks and thought how fortunate we were to reach such an extreme area – an opportunity afforded us by the skills of our captain, crew and expedition team.

But then it was onward. Our hour’s circumnavigation had come to an end and we were off to Mangareva in the Gambier Islands. Our next destination was approximately 600 miles away and two days sailing with sightings of the occasional humpback whale blows as they surfaced way off in the distance. 

Copyright: Words and photos Sue Barnard 2022