Derawan & Kalimantan Explained: 9 Fascinating Facts (and Why Your Visit Matters)

Derawan islands Kalimantan are the kind of place that still feels like a secret. Off the east coast of Borneo in Indonesia’s Coral Triangle, these 31 islands—most famously Derawan, Sangalaki, Kakaban, and Maratua—sit inside Berau Regency, East Kalimantan, surrounded by reefs so alive they hum with color. It’s remote, yes. But that’s part of the magic—and a big reason your visit has real impact.

1) Where are the Derawan islands Kalimantan, and who do they “belong” to?

The archipelago lies in the Sulawesi (Celebes) Sea, squarely in Indonesia’s East Kalimantan province (Borneo’s Indonesian side). Administratively they’re part of Berau Regency. Language? Indonesian, plus local Dayak, Kutai Malay, Buginese and more—Kalimantan is a mosaic.

2) Which of the Derawan islands Kalimantan are inhabited? (…and which are wilderness)

Only Derawan and Maratua have resident communities (villages and small services). Kakaban and Sangalaki are uninhabited—think ranger posts and pristine nature rather than towns. That balance keeps the reefs wild and the nights wonderfully quiet.

3) People, faith, and day‑to‑day life in East Kalimantan

Across the province, the majority of residents are Muslim (~87%), with Christian, Catholic, and other minorities adding to the cultural fabric. In coastal Berau, livelihoods historically lean on small‑scale fishing, with tourism increasingly important as a sustainable complement.

4) A quick history note—and why it feels “remote” today

Pre‑COVID, more international routes made reaching East Kalimantan easier. Some have returned (for example, Kuala Lumpur–Balikpapan nonstop now operates with AirAsia and Malaysia Airlines on multiple weekly rotations), while others are still rebuilding. From Singapore, Scoot serves Balikpapan (BPN)—a helpful hub if you’re connecting to Berau (BEJ) or overland/sea to Derawan.

Most travelers still connect via Balikpapan → Berau, then continue by road and local boat—one reason a night in Balikpapan or Berau can be part of the adventure (and why planning ahead pays off). For Scuba Junkie Sangalaki’s on-the-ground transfer details, see the resort’s guide.

5) Why your visit to Derawan islands Kalimantan matters (for people and the ocean)

Tourism—done right—creates strong incentives to protect reefs and megafauna. NGOs and governments point out that manta rays are far more valuable alive to local economies than as products in trade. Responsible dive tourism helps fund monitoring, enforcement, and community jobs that replace extractive pressure.

6) The marine life “headline” for each island

• Sangalaki: year‑round manta ray encounters (plus turtles galore) across shallow lagoons and channels.
• Kakaban: world‑famous Jellyfish Lake in the island’s interior and dramatic outer‑reef walls.
• Maratua: steep walls, currents, bumpheads, rays, and sharky blue water.
• Derawan: macro critters, turtles, night dives, and easy entries—perfect for mixed experience groups.
  These sit inside the Coral Triangle, one of Earth’s richest marine regions—think 500+ coral species and hundreds of reef fish species recorded around the archipelago.

7) Kakaban’s Jellyfish Lake is closed—here’s why that’s a good thing

Kakaban holds the world’s largest stingless jellyfish lake with multiple endemic species. Authorities have periodically closed access to the lake to support scientific research and protect the fragile, stratified ecosystem from stress (heat events, tourism pressure, and water‑quality concerns). Temporary closures let managers assess conditions and keep this phenomenon intact for the long term.

Good news: even when the lake is closed, Kakaban’s outer reefs deliver jaw‑dropping dives—walls, schooling life, and pelagic cameos. (Our Kakaban diving overview has trip specifics.)

8) Mantas: why past numbers seemed bigger (and what’s changing)

Globally, reef (Mobula alfredi) and oceanic mantas (M. birostris) face pressure from fishing (meat and gill plate trade), bycatch, and slow reproduction. That combination lowers local encounter rates in some seasons and sites. Conservation groups (MMF, Manta Trust) and CITES listings highlight the trend and push for protection.

(Context for guests: mantas mature late and have one pup every few years—recoveries are slow even with protections. When we do see trains of mantas at Sangalaki, it’s extra special—and your respectful conduct and data sharing with researchers make a difference.)

9) How far are the islands from our Derawan base?

From Scuba Junkie Sangalaki on Derawan, plan roughly:

• Kakaban: about 1 hour by speedboat (sea conditions depending).
• Sangalaki: typically within ~45–60 minutes on a dive day plan.
• Maratua: generally longer than Kakaban/Sangalaki, chosen for wall/current days.
  Operational timing varies with weather and itinerary—your guides choose the best mix daily.

Planning tips & ethical notes

• Travel route: Fly SIN/KUL → BPN (Balikpapan) then BPN → BEJ (Berau) if flying domestically onward; or come via Tarakan with speedboat transfers. We keep our Getting Here page updated with routes and timings.
• Support local: Your spend in Derawan and Berau—meals, guides, crafts (reef‑safe!)—keeps conservation economically meaningful for communities historically reliant on fishing.
• Respect closures: If Kakaban Lake is closed, it’s to protect a globally rare ecosystem—thank you for helping it recover and persist.

Your turn

What would you love to learn about Derawan islands Kalimantan next—local culture, manta science days with researchers, or a deep‑dive into our favorite wall sites? Drop your questions in the comments and help shape the next chapter.