Diamond Rock
Martinique · France
Diamond Rock — Rocher du Diamant — is a 176-metre volcanic monolith rising from the sea off Martinique's southwestern tip, famous in naval history as HMS Diamond Rock, the only rock ever commissioned as a Royal Navy vessel. Underwater, the pinnacle's sheer sides are carpeted in deep-water gorgonians and black coral from 15 metres down, with strong currents on the open faces attracting large aggregations of tuna, jacks, and hammerhead sharks on seasonal passage. The rock's four dive faces offer completely different ecosystems within a single site.
Conditions
Depth
8 to 45 m
Advanced depths
Current
Often strong
Can pick up on the edge
Visibility
12 to 22 m
Clearest in the calm season
Water
26 to 30°C
Skin or 1mm
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 27 | 27 | 26 |
| Vis (m) | 20 | 20 | 20 | 18 | 15 | 12 | 12 | 10 | 10 | 12 | 15 | 20 |
| Current | Strong | Strong | Strong | Moderate | Moderate | Moderate | Strong | Strong | Strong | Moderate | Moderate | Moderate |
Your chances of seeing each animal
Martinique'S Anole
Last confirmed Jun 21, 2026 · 389 records
Almost always
Nearly every dive
Carib Grackle
Last confirmed Jun 2, 2026 · 226 records
Almost always
Nearly every dive
Black-Faced Grassquit
Last confirmed May 25, 2026 · 104 records
Almost always
Nearly every dive
Atlantic spadefish
Last confirmed Jul 22, 2025 · 10 records
Very likely
Most dives
Creole wrasse
Last confirmed May 9, 2026 · 6 records
Very likely
Most dives
Scalloped hammerhead shark
Expected
Known here, not yet in recent logs
Yellowfin tuna
Expected
Known here, not yet in recent logs
Gear