THE creature nearly the size of a minibus approached. Swaying at an ocean depth of about 5 meters, it approached a group of divers. The blue of the ocean caused its body to look somewhat blurred from a distance. As it came closer it became more and more visible. Its body was speckled in an uneven pattern. In pursuit of plankton and puri fish—the Papuan name for whitebait—it rose to the surface. Its triangular-shaped fin broke the surface of t