This innovative scientific tool offers a closer look into a manta ray’s courtship ritual. #NatGeoExplorer edysetyawan and his team attach a Nat Geo Crittercam to a manta ray using a suction-cup mount to observe its natural movements and interactions. One deployment, documented near Arborek Island in Raja Ampat, eastern Indonesia, reveals a "mating train" — a courtship ritual where several male rays line up single file behind a female and chase her in a coordinated procession, sometimes for hours. She’ll test the fitness of males by suddenly changing speed or direction, and those who can’t keep up or match her movements fall out of line. The Crittercam was developed by the National Geographic Exploration Technology Lab, which builds and deploys tools to explore, understand and document Earth’s most extreme environments to help advance conservation efforts around the world. This research is conducted in accordance with BRIN's ethics clearance.