Sangalaki Mantas

The encounter

Species / spectacle: Reef manta ray (Mobula alfredi) at cleaning stations and surface plankton feeds, plus green turtles and reef fish; occasional whale sharks in the wider Berau area.

How you see it: dive/snorkel

Typical duration: Dives of 45-60 min; half- or full-day boat trips from nearby islands.

When to go

Resident mantas year-round; plankton-feeding aggregations and best visibility peak in the dry season (roughly July-September).

High and consistent year-round thanks to resident mantas at the cleaning stations.

Best time of day: Daytime dives; feeding activity varies with tide and plankton rather than a fixed hour.

Peak plankton blooms drive large surface feeding aggregations; whale sharks gather at Talisayan / bagan pontoons in the wider region.

Sightings are seasonal probabilities, not promises - even in peak season nature does its own thing.

Who it suits

Difficulty (1-5): 3 (moderate)

Physical demand: Divers need good buoyancy control and must stay still at cleaning stations (approx 15-25 m) and handle possible currents; snorkelers can watch surface feeders easily in shallow water.

Accessibility & group fit: Snorkelers and non-divers can see surface-feeding mantas; the deeper cleaning-station experience requires dive certification.

Options for a mixed group: Dive operators run small groups (roughly 2-4 divers per guide); snorkel groups kept small to avoid crowding mantas.

Permits & responsible travel

Regulation / permits / fees: Sangalaki lies within the Derawan / Berau marine protected area and is managed as a marine park; manta rays are fully protected under Indonesian law (capture banned). Landing on the island is restricted for turtle nesting and reef anchoring is prohibited; park / entry fees may apply (Confirm.).

Guide / crew: Certified dive guide required for dives; PADI operators such as Scuba Junkie Sangalaki run daily trips and courses.

Do not touch, chase or ride mantas, stay low and still, no flash, never block a cleaning station or hover directly above a manta.

Permits, fees and quotas change - confirm before booking.

Safety & hazards

Currents, boat traffic, strong sun and occasional marine stingers; respect no-landing turtle zones.

Weather / conditions: Northwest monsoon (roughly November-March) reduces visibility and brings rougher crossings; currents around the reef.

Remote - nearest recompression chamber is distant (Confirm.); medical evacuation routes back to Berau; dive conservatively.

Getting there & staying

Access logistics: Fly to Kalimarau (Berau, BEJ), road to Tanjung Batu, then speedboat; reach Sangalaki via its dive resort or as a day trip from Maratua / Derawan.

Accommodation / camping: Scuba Junkie Sangalaki dive resort on the island; alternatively stay on Maratua or Derawan and day-trip.

Gear / water / connectivity: Full dive and snorkel gear available through operators; connectivity limited on the outer islands.

Facilities: Dive-resort facilities on Sangalaki; the island is protected with limited public facilities ashore.

Crowds / solitude: Generally moderate; several dive boats can converge on the cleaning stations in peak season.

Operators & guiding

Nearby operators / hubs: Berau / Tanjung Redeb hub; dive bases on Sangalaki, Maratua and Derawan.

Guided trips / outfitters: Scuba Junkie Sangalaki (PADI 5-star); dive operators from Maratua and Derawan resorts.

Operators change - confirm current licensing before you book.

Live conditions & sources

Recent sightings and today's conditions are a runtime layer - check the sources: Scuba Junkie Sangalaki (scubajunkiesangalaki.com); Indonesia Ministry of Tourism (indonesia.travel) Sangalaki page; ZuBlu Diving; Berau MPA / KKP references.