A unique expedition unveils new knowledge about some of the planet’s most threatened species

Set to be one of the most notable scientific expeditions of Raja Ampat of recent years, Indonesia’s luxury private charter vessel, Rascal, recently partnered with Conservation International (CI) for a high-tech scientific voyage across one of the most remote corners of Indonesia’s vast archipelago – in a quest to raise awareness for the protection of manta rays and the seas it cruises.

With world-renowned ichthyologist, Dr. Gerry Allen and Vice President of CI’s Asia Pacific Marine Program, Dr. Mark Erdmann at the helm of the mission, the beautiful private charter phinisi, Rascal collaborated with Conservation International, in a bid to lend support to a cause close to the Rascal team’s heart – sustaining the communities and reducing the negative tourism impact on Raja Ampat. The seven-day pursuit sought to fill in knowledge gaps in the population and migration patterns of manta rays in Raja Ampat, as well as survey coral reef fish biodiversity in some of the lesser-visited areas of Raja Ampat. Armed with a team of Conservation International and Manta Trust scientists, manta ray tagging equipment and cutting edge drone technology, the expedition was a notable progression from Dr. Allen and Dr. Erdmann’s typical journeys, and offered the luxury accommodation and five-star hospitality from Rascal and her crew around the clock.

Dr. Allen says: ‘Rascal was able to take us to Ayau — an area off the beaten path. The biodiversity in these waters is overwhelming, and even after 20 years of diving in Raja Ampat it still continues to amazes me. There is so much we have yet to discover and we are still finding new fish species on most expeditions to Raja Ampat.’

CI’s Gam team installing a manta ID camera. Each manta ray has a unique spot pattern on its belly, which makes it possible to identify individuals.


The expedition immersed the team
 into Raja Ampat’s fascinating
 unstirred waters, local environments,
culture and sustainability. The trip
made scientific headway with the
 underwater discovery of a new
manta cleaning station at Dayan (off
 Batanta Island), identifying at least 
25 new manta individuals, and another cleaning station in Ayau. The team also visited the residents of Abidon Village in Ayau and trekked to the top of Mount Pindito. Not least, the trip was pioneering in terms of surveying technique, with the successful application of brand new drone technology to survey for feeding mantas playing a vital part in the expedition.

Dr. Erdmann explains: ‘Until recently we’ve use boats to survey for mantas feeding in new areas, but due to the nature of the species, this approach is frequently challenging and time-consuming; as mantas are black on top and white underneath, they can be quite difficult to spot cruising beneath the surface, particularly when the sky is overcast. From a vantage point 50-100m above the sea surface, a drone can see much further than the human eye and avoids the glare on the sea surface we frequently have to deal with when scanning from boats. By using them in our efforts, we can cover a large area of sea significantly faster and more effectively’.

Due to overwhelming success in the luxury travel industry, Rascal Voyages is in the process of expanding its fleet to offer expeditions to even more remote and protected seas of Asia and the Maldives. Although the yachts are primarily built for luxury travel, the Rascal team is passionate to play an active CSR role in supporting environmental research of the seas it cruises. The long-term plan is for the Rascal yachts to house marine ‘experts in residence’ that will allow Rascal guests, divers and conservation enthusiasts to have an educational experience whilst on their luxury charter.

Erik Barreto, owner of Rascal says: ‘We’re a team united by our passion for the Indonesian islands and we’re committed to ensuring Rascal contributes positively to the sustainability of remote communities and their livelihoods. By bringing our relationships in this field onboard Rascal for a series of initiatives, we are able to offer a new dimension to our luxury private charter experience, by housing experts in residence to host tours through this incredibly fascinating part of the world.’


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