
Planet Rock
Madang · Papua New Guinea
Planet Rock is a seamount rising from 40 meters to within 12 meters of the surface in the open water outside Madang lagoon, its walls encrusted with some of the most spectacular hard and soft coral growth in PNG. Strong currents sweep the pinnacle and concentrate grey reef sharks, barracuda, and schooling jacks around the summit, while the walls offer wall-to-wall sea fans, black corals, and gorgonians in extraordinary abundance.
Conditions
Depth
12 to 40 m
Advanced depths
Current
Can be moderate
Can pick up on the edge
Visibility
20 to 35 m
Clearest in the calm season
Water
26 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 27 | 28 | 28 |
| Vis (m) | 12 | 12 | 12 | 15 | 20 | 20 | 20 | 20 | 20 | 15 | 12 | 12 |
| Current | Moderate | Strong | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Strong |
Your chances of seeing each animal
Varied Honeyeater
Last confirmed Nov 11, 2025 · 23 records
Likely
About 6 in 10 dives
Singing Starling
Last confirmed Jan 13, 2026 · 12 records
Likely
About 6 in 10 dives
Black Kite
Last confirmed Nov 7, 2025 · 8 records
Likely
About 6 in 10 dives
Torresian Imperial Pigeon
Last confirmed Oct 2, 2025 · 8 records
Likely
About 6 in 10 dives
Willie Wagtail
Last confirmed Dec 8, 2025 · 6 records
Likely
About 6 in 10 dives
Grey Reef Shark
Expected
Known here, not yet in recent logs
Yellowfin Barracuda
Expected
Known here, not yet in recent logs
Sea Fan (Gorgonian)
Expected
Known here, not yet in recent logs
Gear