Dive site · access from Truk Lagoon
Aikoku Maru
Aikoku Maru: an armed merchant cruiser that exploded during Operation Hailstone.
- Depth
- 40–64m
- Current
- Mild
- Minimum level
- Tech required
- Access
- Boat
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The case for it
Why dive here
- A large armed merchant cruiser, roughly 40 to 64m
- Blew apart in the raid; bow section is dramatic
- Deep decompression dive requiring technical training
Check before booking
What may rule it out
- Tech required certification is the stated minimum.
Access and timing
Plan this through Truk Lagoon
Best overall months: Dec, Jan, Feb, Mar, Apr. Check the destination planner for operating season, wildlife and other matching sites.
Wildlife
Seen around Truk Lagoon
rareoccasionalcommonly seenpeak seasondestination closed
These are destination-level records, not confirmed sightings at Aikoku Maru.
Grey reef shark
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Hawksbill turtle
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Giant moray
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Great barracuda
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Anemonefish
| Month | Likelihood |
|---|---|
| January | commonly seen |
| February | commonly seen |
| March | commonly seen |
| April | commonly seen |
| May | commonly seen |
| June | commonly seen |
| July | commonly seen |
| August | commonly seen |
| September | commonly seen |
| October | commonly seen |
| November | commonly seen |
| December | commonly seen |
Nearby alternatives
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Sources & last checked
Checked July 2026
Research is source-backed, but conditions and fees should still be confirmed locally.
View 1 source and checking notes
- Truk Lagoon Wrecks (The Deepest, Biggest, & Most Popular Wrecks), Scuba Diving Earth
Note on the data: Coordinates are approximate; not surveyed dive-site GPS.