The Seychelles atolls are uninhabited or near-uninhabited coral formations 500 miles southwest of the main islands. The flats are vast, the water is clear enough to see fish from a hundred feet away, and the rod pressure is among the lowest on earth — a single mothership serves the atoll for a week at a time, and many of the flats see fewer than 200 anglers per year. This is the only destination where a "grand slam" might include species most anglers can't name. The giant trevally is the apex predator. The milkfish, hooked on a fly, is one of the most powerful fish in the sport. The triggerfish is the strangest puzzle in saltwater fly fishing — beautiful, frustrating, and increasingly the species serious anglers travel to chase. A trip here is a real commitment. It is also the trip that anglers describe for decades.