A moving mobula rays cloud. To make this image, I had to freedive beneath the heart of a vast congregation of mobula rays. The formation was a vertical, chimney-like living vortex. . Visibility dropped quickly. The water was thick with plankton. Jellyfish brushed against my skin. I slowed every movement so as not to disturb them. They accepted me, and for a few breathless moments, I was part of the gang.