Over 100 Manta Rays live year round in the waters surrounding Yap. In the winter (usually December to late April) the Mantas congregate in even greater numbers in Mi'l Channel for the mating season.
  Our partner in Yap is the Manta Ray Bay Hotel in conjunction with Yap Divers. It offers world class accommodations, as well as equipment rentals, lessons, and transportation to and from all of the nearby dive sites.  This is an excellent way to experience diving in Yap, as there are no live-aboard vessels that currently service this area.  That being said, there is still much to experience while diving in Yap waters.Known for its amazing water clarity, Yap offers a wide range of diving opportunities.  With sites spaced evenly around almost the entire island, it is easy to encounter a unique experience regardless of which direction you’re headed.  On the very southern tip of the island, the coral wall has been eroded over time creating an incredible underwater cave network.  Known as Yap Caverns, this site is open for endless exploration, as divers can explore chimneys and chutes, as well as open caverns.  For the most part the site is very easily navigable and can be experienced by beginners.  Don’t think that the caverns are the only things to see here, as there is plenty of ocean life to be seen as well.  Keep an eye out for white-tipped sharks resting on the sandy bottom, as well as schools of parrotfish, and the occasional lionfish.  To the east, divers can find multiple other sites including Manta Ray Bay where local operators will guarantee manta ray sightings here nearly year round.  Swimming with the massive rays can be quite the experience even for the most seasoned divers.  Similar dives can also be done at sites such as Manta Ridge, and Valley of the Rays, although keep in mind, these open-water dives can make for stronger currents, and tiring dives.