We tagged 5 oceanic manta rays in the Revillagigedo Archipelago on the latest Manta Trust Expedition. These tags will remain on the mantas for 6 months, at which point they will detach, float to the surface and transmit their data back to us via satellite. The tag data will show us where the mantas have traveled over the previous 6 months, identifying critical habitats, migratory corridors and other important regions that can be targeted for effective conservation. In Mexico, our main objective is to reduce harmful fisheries interactions that leave manta rays with permanent bodily damage, and in some cases can result in incidental bycatch. These particular mantas hung around for 4 dives after being tagged, and continued to interact with divers (including the researchers who tagged them), indicating that being tagged or biopsied is not a traumatic experience for an oceanic manta ray! Support for these tags was generously provided by the New England Aquarium MCAF and Carl F. Bucherer Watchmakers.