Sulu Sea, Philippines
Tubbataha Reefs
Two uninhabited atolls and a separate reef in the middle of the Sulu Sea, inside a 96,828-hectare no-take national park, accessible by liveaboard for roughly three months a year.
- Reef manta ray
- Reef
- Sharks
- Variable current
Best season
Best Mar–Jun
Minimum cert
Advanced
Water
26–29°C
Current
variable
Season
When this place works
The hardest access window in this dataset. Roughly mid-March to mid-June only, which is why March and June read 'limited' rather than 'open'. Outside it the northeast monsoon (Nov-Mar) and southwest monsoon (Jul-Oct) make the crossing to…
Why dive here
What this place is known for
01reefIntact atoll reef system
The actual draw, and the thing that gets buried under shark marketing. Over 360 coral species, close to 90% of all coral species recorded in the Philippines, on reefs that have never been fished or settled. Vast staghorn fields and near-total coral cover on…
02sharkWhitetip reef shark density
UNESCO records the highest known population densities of whitetip reef sharks anywhere in the world. A specific, verifiable superlative rather than the usual 'shark diving' claim.
03wallAtoll walls
Southwest Wall, Black Rock, Ko-ok. Vertical drops from the reef crest into open Sulu Sea, dived as drifts.
Marine life
Twelve-month species timelines
Highest known population density in the world per UNESCO. Resident; you simply cannot get there for nine months of the year.
The atolls are a significant nesting, resting and juvenile development area, so densities are unusually high.
Endangered elsewhere in the region and heavily fished; Tubbataha holds a protected population. UNESCO names it explicitly, but only that one source does, so this sits at medium rather than high…
Present but not a cleaning-station product. No reliable aggregation site inside the park.
Recorded in the park but not predictable on a given trip. Encoded as unreliable in all months rather than assigned a season no source supports.
Conditions
What the water is like
Water temp
26–29°C
15°C — 32°C
Visibility
24–36 m
0 m — 40 m
Current
variable
mild — strong
Thermoclines
Not typical
unlikely
Minimum certification — Advanced
Current is the variable that matters and it is tidal rather than constant; operators time dives around slack. When it runs on the wall corners it runs hard, and there is nothing downstream but open Sulu Sea, so SMB competence is not…
Entries — boat
Recommended & required
- nitrox — recommended. Repeated wall dives across a week.
Logistics
How people dive it
6-7 days
scuba
The only access, and only during the season. Roughly 10-12 hours crossing from Puerto Princesa, Palawan, which is a 90-minute flight from…
Operators
Who to book with
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Sources & verification
Check the evidence.
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