Check out the Manta Ray expedition ran by Barefoot Conservation into remote Raja Ampat...

Introduction:

Barefoot Conservation have developed an Expedition into remote Raja Ampat in search of Manta Rays. 10 fantastic days, 25+ dives exploring Raja Ampat Central and Southern Misool regions. Crossing two of the largest Marine Protected Areas within Raja Ampat, the Dampier Straight and Misool MPAs.