Big Fish Country (Maratua Channel)
Maratua's channel is the region's big-animal dive. The schooling barracuda here are reported as one of the larger aggregations in Southeast Asia, though no published count exists. It runs hard, and it is not a site to try current diving for the first time.
Depth
10–40m
Current
Strong
Diver level
Advanced open water
Entry
Boat
Unique features
- The atoll's single reef channel — chevron barracuda and bigeye trevally school at the mouth
- Grey reef, whitetip and blacktip sharks; eagle rays and tuna pass through
- Tidal flow drives everything; the dive is timed to the water, not the schedule
Sources & last checked
Checked August 2026
This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.
- Sangalaki Diving, Kalimantan - Indonesia — Dive The World
- Dive Maratua — Scuba Junkie Sangalaki
Note on the data: Coordinates are approximate; not surveyed dive-site GPS.