Region: Nullarbor Plain, WA
Skill Level: Advanced
Depth: 10–100m
Water Temperature: 17–20°C
Visibility: 20–40m
Best Time to Dive: April–October
Description: Longest underwater cave penetration in Australia (~6 km). Extreme logistics.
Marine Life: Cave fauna
Hazards: Depth, navigation, isolation
Facilities: Expedition-grade only