As of today, out of season, returns ~December. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Nassau grouper (Epinephelus striatus) form dense spawning aggregations at predictable reef sites across the Caribbean.
Little Cayman hosts one of the best-studied and most reliable aggregations, with fish gathering on a few reef promontories for a series of full-moon nights each winter, producing intense night-time breeding behavior that is observable by experienced divers and licensed charters.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Bloody Bay Marine Park - Primary Spawning Reef |
| Colliers / North Reef Spawning Site |
| + 1 more spot, with exact coordinates and timing, in the app → |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.