Small-group diving trips in eastern Indonesia, each one hosted by MMF scientists.
Upcoming expeditions
These aren't ordinary dive trips. Every departure is hosted by an MMF scientist, with a series of evening presentations on the animals, the research, and the threats they face, and guests are shown how to take photographs that contribute to the global photo-identification databases our research depends on. MMF is a registered 501(c)(3) non-profit, and 100% of the profit from every MMF expedition supports MMF's research, education, and conservation work.
7 departures between May 2027 and September 2028 aboard Coralia and Coralia Dua, priced per person from the lowest cabin.
Availability last confirmed: Cenderawasih Bay on 30 October 2026; Komodo, Banda Sea, Raja Ampat and Cenderawasih Bay on 17 October 2026. We confirm today's space when you inquire.
On board
Two boats, one team
Coralia
Komodo and Banda Sea
A classic wooden phinisi built for diving and run by cruise directors Debbie and Jerry Arriaga. At 48 meters (157 feet), she has eight cabins, each named after a coral species, one of them kept for the MMF host, so our trips carry 14 guests, with 20 crew: more than one crew member for every guest.
Readers Choice Awards 2026Scuba Diving Magazine · #1 for crew, safety, value, and luxury
Photo: Coralia Liveaboard
Artist's impression
Coralia Dua
Raja Ampat and Cenderawasih Bay
The new sister ship of the original Coralia, launching in 2026 and run by the same team, with cruise directors Debbie and Jerry Arriaga. At 52 meters (171 feet) long and over 10 meters (33 feet) wide, she has eight cabins, one of them kept for the MMF host, so our trips carry 14 guests, with 21 crew.
Photo: Coralia Liveaboard. Coralia Dua launches in 2026, so the pictures of the ship and her cabins are artist's impressions from Coralia Liveaboard.
The brochures
Each trip at a glance, with your hosts, the itinerary, the boat and the prices, on printable pages to read offline or share.
Hosted by MMF scientists, booked with the operator
These trips are run by our partner operators, with an MMF scientist on board. Book directly with the operator: they are not part of MMF's own departures or its inquiry form.
Inquiring is not a commitment. A 30% deposit and the completed terms form confirm your cabin, and the balance is due 120 days before departure. Travel insurance is required, and divers also need dive insurance that covers emergency evacuation.
Certified divers of all experience levels are welcome, and each dive guide leads no more than four guests. Snorkelers are welcome too, and the Cenderawasih Bay whale sharks are seen at the surface.
How experienced a diver should I be?
Some sites have currents and depth, so recent diving helps you get the most from them. Tell us your certification, logged dives, and when you last dived when you inquire, and we will confirm the trip suits you. Courses, including Advanced Open Water and Nitrox, can be arranged on board if you book them ahead.
What insurance do I need?
Personal dive-accident insurance that includes emergency evacuation (Divers Alert Network is recommended) is required for every certified diver. Our trip terms and conditions also require comprehensive travel insurance covering trip cancellation and interruption, overseas medical expenses, and emergency evacuation: these trips run in remote places where medical care is scarce, and MMF cannot help with canceled flights or lost luggage.
What if my flight is delayed?
Contact the boat straight away. Depending on the itinerary and where the boat is, the crew will do everything possible to help you join. Plan a spare day either side for international flights; the last full day ends with two morning dives, finished around 1 pm, so you can fly safely.
Inquire about a departure
Tell us which departures you are interested in and your group size. The trips team replies with availability, prices and the next steps. Back-to-back trips are possible: the two Banda Sea crossings, or both Raja Ampat departures.
Our work is made possible by MMF’s core supporters
Full22 May – 4 June 2027
Open for booking6 – 18 October 2027
3 cabins available21 October – 2 November 2027
Open for booking20 – 31 March 2028
Open for booking2 – 13 April 2028
Open for booking8 – 18 August 2028
Open for booking20 August – 1 September 2028
Artist's impression
2–9 December 2026
2 spots available
12–21 December 2026
21–28 July 2027
Rolling intake
