Dive site · access from Mergui Archipelago
Black Rock
A single exposed limestone rock in open water, sloping to reef and sand.
- Depth
- 5–40m
- Current
- Strong
- Minimum level
- Advanced open water
- Access
- Boat
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The case for it
Why dive here
- Limestone islet roughly 160km northwest of Kawthaung; the region's oceanic manta site, with cleaning stations on the reef
- Over 95% of the area's logged manta encounters happen here — 276 encounters and 216 photo-identified individuals since 2011
- Ranong guitarfish have been found resting in groups on sand at 25–30m in December and January of positive Indian Ocean Dipole years
Check before booking
What may rule it out
- Advanced open water certification is the stated minimum.
Access and timing
Plan this through Mergui Archipelago
Best overall months: Dec, Jan, Feb, Mar, Apr. Check the destination planner for operating season, wildlife and other matching sites.
Wildlife
Seen around Mergui Archipelago
rareoccasionalcommonly seenpeak seasondestination closed
These are destination-level records, not confirmed sightings at Black Rock.
Giant oceanic manta ray
| Month | Likelihood |
|---|---|
| January | occasional |
| February | peak season |
| March | peak season |
| April | occasional |
| May | occasional |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | rare |
| December | rare |
Whale shark
| Month | Likelihood |
|---|---|
| January | rare |
| February | rare |
| March | rare |
| April | rare |
| May | rare |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | rare |
| December | rare |
Bentfin devil ray
| Month | Likelihood |
|---|---|
| January | rare |
| February | occasional |
| March | occasional |
| April | rare |
| May | rare |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | rare |
| December | rare |
Grey reef shark
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | occasional |
| December | occasional |
Indo-Pacific Leopard Shark (Zebra Shark)
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | destination closed |
| July | destination closed |
| August | destination closed |
| September | destination closed |
| October | destination closed |
| November | occasional |
| December | occasional |
Nearby alternatives
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Sources & last checked
Checked August 2026
Research is source-backed, but conditions and fees should still be confirmed locally.
View 2 sources and checking notes
- Black Rock & the Twins ISRA Factsheet, IUCN SSC Shark Specialist Group
- Diving in Burma (Myanmar) - Mergui Archipelago, Dive The World
Note on the data: Coordinates are approximate; not surveyed dive-site GPS.