As of today, past peak, season runs to ~July 31. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Each autumn and early winter, the southern giant spider crab (Leptomithrax gaimardii) forms large seasonal aggregations in parts of Port Phillip Bay.
Divers and boat-based tours observe dense clusters on reefs and sandy plains as adults gather to mate and molt.
Locations and timing vary with water temperature and currents.
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 |
|---|
| Popes Eye (Port Phillip Heads area) |
| Flinders Jetty and Nearby Reefs |
| + 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.