
In this episode, we meet with Dr Simon Pierce, Executive Director of the Marine Megafauna Foundation (MMF) and Janis Argeswara, MMF’s country manager for Indonesia. We discuss the rising popularity of swim-with tourism with whale sharks and manta rays, and ask, should we be swimming with these mega-giants, or are we loving them to death?
More about our guests


Simon Pierce
Dr. Simon Pierce is the Executive Director and co-founder of the Marine Megafauna Foundation. His research focuses on the conservation of marine megafauna, specialising in whale sharks but also including manta rays, sea turtles and the critically endangered grey nurse shark. His scientific speciality is marine conservation biology and his research focuses on the use of photo identification to non-invasively monitor populations of species with unique marking such as manta rays and whale sharks. You can find out more about Simon and his work on his website
Janis Argeswara
Born and raised in Jakarta, Janis discovered her love for the ocean through childhood aquarium visits, a first encounter with sea turtles in Bali, and an obsession with being underwater that led her to pursue marine science. What began as a way to dive more has grown into a full conservation career, where she now serves as Country Manager (Indonesia) & Scientist at Marine Megafauna Foundation, leading research on manta rays, sea turtles, and sharks. Equally at home in the field and at her desk, she is driven by a deep commitment to science, community, and the animals she has dedicated her life to protecting.
If you want to know more about Simon, Janis, the work of the MMF, or responsible megafauna tourism, check out the links below!
Follow Janis, Simon and MMF on Instagram
Visit the Marine Megafauna Foundation website
Check out MMF Indonesia Resources
Join an MMF swim with expedition
Other Links:
The Manta Trust has recently published a study estimating that Maldives manta tourism generated US$227.3 million in 2021, representing 2.6% of the Maldives’ national GDP, with a total economic impact exceeding US$311 million annually when indirect spending is included. https://www.mantatrust.org/maldives-manta-value

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