Thanda Island, an exclusive-use private island surrounded by a protected marine reserve, has recently joined forces with The Marine Megafauna Foundation (MMF), a globally recognized marine conservation NGO, to aid in the conservation efforts of whale sharks in Mafia Island, Tanzania.
This collaboration aims to minimize the impact of tourism on these majestic creatures, which are facing threats from increased boat traffic and the use of large, near-invisible gillnets in their feeding areas.
Preserving a Unique Population
Mafia Island, renowned as a hotspot for whale sharks, hosts a resident population of these gentle giants.
The MMF employs robust capture-mark-recapture modelling techniques, utilizing the distinctive spot patterns of whale sharks akin to human fingerprints, to estimate population trends without directly interfering with the animals.
Thanda Island’s partnership with MMF ensures that the island receives valuable updates and insights into the local whale shark population, aiding in conservation efforts.
Hands-On Conservation Efforts
Thanda Island actively participates in MMF’s research days alongside onsite Marine Biologist Rianne.
This involvement includes various activities such as collecting skin samples, satellite tagging, and even collecting whale shark excrement to gain a deeper understanding of these creatures.
Such collaborative efforts not only contribute to scientific knowledge but also enhance the guest experience through educational opportunities.
Responsible Tourism
For those seeking the awe-inspiring experience of swimming alongside whale sharks, Thanda Island offers responsible Whale Shark expeditions prioritizing the safety of both guests and sharks.
These encounters provide guests with a once-in-a-lifetime experience while ensuring minimal disturbance to the animals. Whale sharks, known for their docile nature and plankton-eating habits, present no threat to humans despite their impressive size, making for a truly surreal experience.
Conservation Impact
MMF’s ongoing research and conservation project in Mafia Island, initiated in 2012, has significantly contributed to the protection of whale sharks in the region.
Collaborating with various organizations, including the Tanzania Fisheries Research Institute and WWF Tanzania, has led to increased ecotourism focused on shark conservation and legal protection for whale sharks in Tanzania.
The efforts have resulted in a better understanding of the local whale shark population dynamics, emphasizing the importance of continued conservation initiatives.
Unique Underwater Experiences
Thanda Island offers unparalleled diving experiences within its protected marine reserve, allowing guests to immerse themselves in the underwater world. Witnessing whale sharks in their natural habitat is considered one of the most emotional and spectacular ocean encounters.
As these vulnerable giants feed near the island from October to March, guests have the opportunity to swim alongside them or observe them from the comfort of luxury adventure vessels, guided by experienced captains and resident whale spotters.
In conclusion, Thanda Island’s partnership with the Marine Megafauna Foundation underscores its commitment to responsible tourism and marine conservation.
By actively participating in research initiatives and offering unique experiences to guests, Thanda Island plays a vital role in safeguarding the future of whale sharks in Mafia Island and beyond.



