Manta Research Opportunity



Julie Hartup was on island last week performing her research as project leader of the Yap Manta Project.

Along with her routine data collection, community building and guest relations, she presents her data and involves all of us in her work.

These photos were taken the night after the Meet the Managers welcome cocktail toast with Bill, where Julie introduces her work with Yap’s manta data that is interesting by itself.



Yap’s manta ray population is small in terms of populations studies in Mozambique and the Maldives – however what is being learned is that studying these smaller populations, the lives of individual mantas can be studied offering a new spin of manta data.

Here in Yap we have mantas that have been ID’d for the past 30 years and newcomers to the database that are 30 days old. This provides researchers the ability to look closely at the lives of individual animals from just after birth into sexual maturity and even reproduction.



Yap manta research is as exciting as researching mantas gets.

Some facts about this population are somewhat new, scientifically speaking.

After years of compiling data on these rays, one can look at what’s going on with this family of animals.



One of the things that is noted here in Yap is that our mantas show strong reproductive behavior and some of our female mantas are pregnant back-to-back years.

Other large population research data shows that mantas reproduce every ~3-5 years, but our top females are pupping a new manta about every year which is great news for those of us who love to dive with these animals.



Julie’s science is community-based and she encourages involvement and participation with her work as well as marine conservation in general.

Our fastest growing event is Manta Mania where we host the top manta and shark scientists in the world who share their research and help divers become conservationists in action.

This is something that Julie shares every time she’s in Yap – if you want to learn about Yap’s mantas from the scientist who studies them the most, you’re more than welcome.

Stay in touch with us or sign up for our newsletter to be informed about upcoming opportunities to learn and dive with Julie and Yap’s mantas.

Citizen Science is the keyword here, all of us can help protect this population of mantas – the ID database is critical to studying these animals and any of us with a belly shot of a Yap manta with the date it was taken can help conserve one of Yap’s most precious resources.

Email images to

Join the Science


Yap is a very special place to dive and interact with manta rays. The more we learn about them, the more obvious it becomes that Yap’s resident rays are a unique experience, for scientists and divers.


The consistency and proximity of interactions with these animals makes for a very personal experience – and if you’re a scientist, you get to study the lives of these rays in detail.

Get involved with these animals and the people who protect them.




Availability & Reservations

Jim Reilly
Jim Reilly
11:27 21 Mar 18
We stayed at the hotel and dove with Manta Ray divers in early December 2017. The hotel is very comfortable, well run and staffed with wonderful employees. During our visit my wife came down with an illness and the consideration and support from the hotel and dive staff could not have been more
Sandy Stinson
Sandy Stinson
16:03 03 Mar 18
The staff couldn't be more friendly and accommodating. Food is good, (worth upgrading to include all meals). Diving is good more
Alex Divinsky
Alex Divinsky
17:24 01 Jan 18
The best place to stay in Yap. The resort is really nice and clean, the scuba diving is great, and the docked ship that houses the bar, restaurant, and movie screen is very cool. I really enjoyed my stay more
10:44 01 Jan 18
Offers one of the best accommodation service. It also has a uniquely designed restaurant.
Yi-Hsin Lin
Yi-Hsin Lin
00:53 21 Feb 17
The whole place centers around the scuba diving operation. Probably better to find somewhere else if you're not a diver. The dive operation was generally good, but a little too laid back - schedules weren't always clear, and sometimes would change without any notice. Sometimes it was hard to tell if this was really because of changing tides/weather or because of the island pace of life. Pizza is a surprisingly good option at the more
William Myers
William Myers
21:01 21 Jul 18
Great hotel. Have stayed twice.
Emily Caquelin
Emily Caquelin
04:10 02 Aug 18
Manta Ray Bay Resort is a great dive resort with extremely hospitable staff.
Daniel Granzer
Daniel Granzer
11:40 23 Aug 18
We were from 11.08 to 18.08 at the Manta Ray Bay resort and had unforgettable days there 😍In total we made 12 dives with wonderful encounters. Highlights were, of course, the manta rays in the Goofnuw Channel and many white tip reef sharks in the Shark City 🦈 But also we saw eagle rays, turtles 🐢 and buffalo head parrotfish. The hotel is beautiful and the whole team does a great job there. The food on the ship Mnuw, as well as the home-brewed beer are excellent. Thank you again to the whole team of Manta Ray Bay Resort and Yap Divers 👏🏼We also did a one-day land tour to explore the many beautiful places of this unique island. The beach is like in paradise🏝, stone money and relics from the second world war very worth to see! You find there also culturally typical houses with different meaning and use! It would be nice if more visitors would come to this great island and appreciate the great work that is done there! Anyway, we really enjoyed it and would come back anytime 🙏🏻✌🏼read more
Jonathan Gapith
Jonathan Gapith
10:31 19 Sep 18
Best dive resort around, amazingly friendly staff and great food on the mnuw
Rene Sten
Rene Sten
04:06 12 Oct 18
Bill and his family run a great dive resort, rooms are spacious and comfortable. Restaurant and bar provide good range of food and drink. Bill and his dive guides know the reef intimately and the diving is spectacular. Bill and his family make for a very friendly and rewarding experience in more
Ms. Malinda
Ms. Malinda
13:52 14 Oct 18
Great place to stay while visiting the island. Lots of activities to do with places to see & people to more
Jan Toman
Jan Toman
22:14 02 Nov 18
Great! GREAT! GREAT! Lovely place, lovely staff, great location for divers!
Deb Roy-Stothart
Deb Roy-Stothart
13:55 06 Dec 18
The highest level of dive service ever experienced! Fabulous dive operation from crew, boats, snacks, hot tea and water, warm towels etc. etc. and of course the Manta Rays!! Thank you for making my 100th dive so memorable. Accommodations 5 star! Food was fabulous! Can't say enough about this beautiful Island and it's people. Loved Yap! Deb & Glenn, London, Ontarioread more
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