Raja Ampat is often called the most biodiverse marine region on the planet. Sitting within the Coral Triangle, the reefs here hold staggering numbers of coral species, reef fish, manta rays and organisms we are still documenting. It can feel almost improbable… the kind of place marine biologists dream about and conservationists worry about in equal measure. The very traits that make manta rays and sharks powerful conservation ambassadors also make them magnets for visitation. Social media rewards close encounters and bucket lists drive demand. Even small groups, if repeated daily across a season, can accumulate impact. Manta rays and many shark species grow slowly, mature late and produce few young; it’s a life history strategy that works great in stable oceans, but it fails quickly under heavy fishing pressure or habitat degradation. In Indonesia, some populations have rebounded thanks to legal protection while others remain data-poor, their trajectories uncertain. Against this backdrop, the rise of “conservation expedition cruising” raises a simple but uncomfortable question: can bringing more people into a fragile region ever truly align with conservation goals?
Yeray Moreno, Head of Experience and Conservation at Rascal Voyages, argues that the answer depends entirely on how the voyages are structured. “Running any voyage, and especially a conservation voyage, comes with a very high level of responsibility and an active willingness to learn and adapt. For us, that starts with working alongside local NGOs, marine authorities, and local communities to ensure that our presence does not add pressure during sensitive periods,” Moreno explained. “Conservation voyages only make sense when they are built around the needs of an NGO and led by experts in the field. The power lies in numbers, not in performance. If more people become genuinely interested in manta rays, for example, that interest often translates into donations, adoptions, and long-term support that funds scientific research and larger protection efforts.”
In Raja Ampat and Komodo, their manta-focused expeditions are built around the needs of research partners such as The Manta Trust and local NGOs. Guests may assist with photo identification, documenting the unique belly patterns that allow scientists to track individuals across years and even across regions. But direct interactions, including tagging, are led solely by trained researchers. “Guests do not actively participate in the physical tagging. They may assist with equipment, coordination, observation, or photo-identification, but all direct interaction with wildlife is led solely by scientists,” Moreno emphasized. This distinction matters because manta rays are highly sensitive to disturbance. In this region, they are usually found at cleaning stations where they hover as small fish remove parasites, so if you disrupt that behavior then you disrupt a critical health service. Because this phenomenon was well know, a popular manta ray cleaning station in Raja Ampat’s Dampier Strait known as “Manta Sandy” faced heavy tourism pressure, with up to nine boats and 50 divers at a time, leading to rule violations and disturbances that appeared to reduce manta presence. A coalition of NGOs, government, local villages and dive operators created a permanent ranger station staffed by four local rangers and funded through marine park fees to better manage tourism at the site. By enforcing visitor limits, regulating boat access and applying a strict code of conduct, the station appears to be contributing to an increase in manta aggregations, suggesting improved protection through stronger local oversight.
Steve Ebsworth, co-founder of Rascal Voyages, believes scale and control are the answer when people ask if bringing more people into manta and shark habitat genuinely supports their protection. Their vessels host no more than ten guests and operate only part of the year. “We support higher park fees, tighter regulation, and stricter enforcement, even though that makes life harder and more expensive for operators like us.” The logic, he believes, is straightforward: if manta conservation is the goal, growth cannot be limitless. Luxury, in this framing, is about maintaining small numbers, trained guides and systems that minimize discharge and waste. “Luxury is not the issue. Growth without limits is.”
And the science itself shapes what the trip will look like! Expedition-based research can fill critical data gaps; for example, photo identification catalogs reveal site fidelity, migration corridors and population size estimates. Tagging studies can uncover movement beyond park boundaries, highlighting where protection may falter. If mantas and sharks tagged in Komodo regularly travel outside protected areas, management cannot stop at park lines. Data, when robust and sustained, can strengthen arguments for broader spatial protection and cross-border cooperation. “If, five or ten years from now, the research partners we work with have better data, stronger arguments for protection, and more leverage with governments and marine authorities, then we have done our job,” said Ebsworth.
Data is important, yes, but it alone does not guarantee change. That’s where political will, enforcement capacity and community support come into play, ultimately determining whether sharks and rays benefit. “In Raja Ampat, The SEA People have spent over a decade building relationships, training local teams, and creating long-term employment through coral gardening,” said Yeray. “Their work is entirely community-driven, supported by education initiatives such as those run with Child Aid Papua. Our role is to ask how we can support that work.” Rascal Voyages created the “Rascal Coral Garden” with them at Yaf Keru, a long-term reef restoration site where coral is actively rehabilitated. In regions like Komodo, where fishing pressure can stem from economic necessity, protecting manta rays and sharks requires alternative livelihoods and trust, not just patrol boats and regulations. There is also the broader climate context for both of these locations; ocean warming, acidification and shifting productivity patterns are altering the ecosystems that sharks and manta rays depend on, so even perfectly managed tourism cannot buffer these species from global change. In that sense, expedition-based science operates in a narrowing window. Can it accelerate data collection quickly enough to inform adaptive management?
Watching a documentary about mantas, reef sharks, or this area is one thing. Hovering at a respectful distance as a giant wingspan glides overhead is another. Experiences like this can shift a person’s perspective in ways that academic papers rarely do. “If guests remain engaged, supporting research, funding, and advocacy long after they leave, that matters more to me than anything that happens on a single voyage,” said Ebworth. But does that emotional connection justify the footprint required to create it? Or is the long-term engagement precisely what makes the trade-off worthwhile? He believes so: “The most important thing guests do is not discovering something on a single voyage. It is enabling continuity, by supporting long term work, respecting boundaries, and staying engaged once they are home. The real impact of a conservation expedition is not what happens during the trip. It is what continues because the trip made sustained work possible.”
Raja Ampat will remain biodiverse only if protection keeps pace with pressure. Expedition-based science could contribute valuable data, funding and public engagement. It could also, if poorly managed, add to the strain. And in the broader scope of things, the question extends beyond one company or one archipelago. As climate change accelerates and tourism rebounds globally, it begs us to ask ourselves what models of travel we are willing to accept. Can small-scale, science-led expeditions serve as a bridge between public fascination and political will? Or will demand inevitably push even the most careful operators toward growth? What is unfolding in Raja Ampat is a reminder that conservation is not a static achievement, but instead an ongoing negotiation between people, profit and place. Whether conservation expedition cruising becomes part of the solution or part of the problem remains to be seen.
