Ocean Atlas · Asia
Indonesia
Mantas, common turtles and extraordinary coral diversity, from relaxed Bali coasts to Raja Ampat.

Ethics pass, with care. We found a way to visit this country that meets our animal-welfare standard, as long as we work with the right local operator. Checked by Ocean Calling on 29 Sep 2026. Sources: Indonesia pledges to protect manta rays, Mongabay, 2014; The case of Lovina, Bali: how dolphin-watching procedures put village hospitality revenue at risk, IWC Whale Watching Handbook, 2022; The whale sharks of Cenderawasih Bay, DIVER magazine.
🧭 Travel advice, checked 30 Sep 2026. The UK FCDO advises against all travel to parts of Indonesia, namely within 7km of Mount Lewotobi Laki-Laki on Flores and within 5km of the Mount Sinabung crater in North Sumatra. Sources: UK FCDO travel advice, Indonesia Advice differs by passport: check your own government before you plan.
Why Indonesia
Amed on Bali is a relaxed coast for freediving and diving, with the Liberty wreck nearby, and on Gili Air and Gili Trawangan turtles are common. Komodo is known for manta dives and reef sharks, with Komodo dragons on land. Raja Ampat has extraordinary coral and fish diversity, with reef and oceanic mantas, and the quiet Maratua and Derawan islands are known for turtles and barracuda. The best months differ from place to place.
Conservation-led. Ocean Calling guests never chase, touch or bait animals.
When to go
Timing changes a lot from place to place. See each place below.
You can travel here with Ocean Calling now.
Can we travel here ethically?
Ethics pass, with care
Good with the right operator. Here is how we choose.
Indonesia fully protects manta rays since 2014, and many reefs, from Bali to Raja Ampat, can be enjoyed with no feeding or touching. Some famous experiences do not meet our standard: at some fishing platforms whale sharks are fed baitfish, and in Lovina many boats race after resting dolphins. We choose small quiet groups with mantas and turtles, and we watch dolphins only from a calm, distant boat.
Checked 29 Sep 2026. Places change, so we look again every year.
Trips in Indonesia
Amed, Bali
Travel with usA relaxed coast for freediving and diving, with turtles, reef life and the Liberty wreck nearby.
🤿 In the water: Turtles, Reef fish, Macro life, Liberty wreck (Tulamben)
When: Year-round. Diving all year. April to November is drier, with clearer water and calmer seas.
Gili Trawangan
Travel with usA lively island with easy diving, common turtles and a busy social scene after dives.
🤿 In the water: Turtles (common), Whitetip reef sharks, Mantas (occasional, Jul-Oct), Reef fish
When: Year-round. Diving all year. May to October usually has clearer water and better boat days.
Gili Air
Travel with usA social but relaxed island where turtles are common and reef conservation work runs all year.
🤿 In the water: Turtles (common), Coral reefs
When: Year-round. Diving all year. May to October is drier, with the clearest water.
More of Indonesia’s ocean
Short notes from our research. Wildlife is never guaranteed.
Komodo
Trusted referralKnown for manta dives, reef sharks and turtles, with Komodo dragons on land.
🤿 In the water: Manta rays, Reef sharks, Turtles
⛵ From the boat or shore, never in the water: Komodo dragons (on land)
When: May-Sep. May to September is dry, with better visibility and more mantas.
Maratua and Derawan
ExploringA quiet archipelago known for turtles and barracuda, with mantas possible on trips to Sangalaki.
🤿 In the water: Green and hawksbill turtles, Barracuda and jacks, Grey and whitetip reef sharks, Eagle rays, Mantas (Sangalaki, conditions allowing), Kakaban Lake jellyfish (swimming is allowed under park rules, checked on the day)
⛵ From the boat or shore, never in the water: Nesting turtles and hatchlings (watch only, hands off)
When: Apr-Oct. April to October brings calmer, drier weather. May to September is the most reliable.
Rules and fees: Maratua and Derawan lie inside a large marine protected area created in 2016, which includes no-take zones where nothing may be caught or taken. Kakaban Lake: swimming is open again under park rules, with no fins, no scuba, no sunscreen or lotion and no touching. The rule has changed before, so it is checked on the day. Last field check: July 2026.
Raja Ampat
ExploringExtraordinary coral and fish diversity, with reef and oceanic mantas, reef sharks and turtles.
🤿 In the water: Reef and oceanic mantas, Reef sharks, Green and hawksbill turtles, Diverse corals and reef fish, Macro life
⛵ From the boat or shore, never in the water: Birds of paradise (Waigeo), Spinner dolphins (regular, from the boat), Bottlenose dolphins (regular, from the boat), Risso's dolphins (occasional)
When: Oct-Apr. Late October to April has calmer seas. Mantas are often seen December to March.
Rules and fees: In Raja Ampat sharks and manta rays are protected by local and national law, so catching, keeping or trading them is not allowed.
Nusa Penida
ExploringKnown for reef manta cleaning and feeding sites, and for seasonal mola visits at Crystal Bay.
🤿 In the water: Reef mantas, Mola (seasonal)
When: May-Oct. The dry months from May to October bring clearer water. Ocean sunfish visit from July to October, with the peak in August and September, and reef mantas are seen all year. Nothing is guaranteed, and the boats can be crowded in peak months.
Lovina, Bali
ExploringSpinner dolphins live close to shore here, but crowded sunrise boat trips have a documented impact on them. We do not book the standard mass-boat trip.
⛵ From the boat or shore, never in the water: Spinner dolphins (year-round, from a distance only), Fraser's dolphins (occasional), Risso's and spotted dolphins (occasional)
When: Year-round. Dolphins are seen all year, mostly in the early morning. Research here has documented crowding, close approaches and chasing by boats, so we only watch from far away, or not at all.
Mantas in Komodo, dragons on its islands
In the water
Komodo National Park is known for manta dives, reef sharks and turtles.
On land
The same park protects the Komodo dragon, the largest living lizard, which lives wild only on a few Indonesian islands.
Diving days and a guided dragon walk fit in the same trip, inside one national park.
Dragons are only visited with an authorised park ranger or naturalist guide, on marked trails and in a group. Serious bites are rare but have happened. Park visitor rules changed in 2026, so check the current rules before you go.
Wildlife is never guaranteed, on land or at sea. This is research, not a trip on sale.
Sources for this section
Animals recorded in Indonesia
Tap an animal to learn how it lives, where it travels and how to meet it respectfully.
Green turtleChelonia mydasSeen in 103 countries in the AtlasLeast Concern
Sperm whalePhyseter macrocephalusSeen in 114 countries in the AtlasVulnerable
Broadclub cuttlefishAscarosepion latimanusSeen in 15 countries in the AtlasData Deficient
Humphead wrasse (Napoleon wrasse)Cheilinus undulatusSeen in 34 countries in the AtlasEndangered
Ocean sunfish (mola)Mola molaSeen in 29 countries in the AtlasVulnerable
Spotted garden eelHeteroconger hassiSeen in 19 countries in the AtlasLeast Concern
Common (estuary) seahorseHippocampus kudaSeen in 25 countries in the AtlasVulnerable
Zebra sharkStegostoma tigrinumSeen in 17 countries in the AtlasEndangered
Fraser's dolphinLagenodelphis hoseiSeen in 18 countries in the AtlasLeast Concern
Risso's dolphinGrampus griseusSeen in 56 countries in the AtlasLeast Concern
Pygmy blue whaleBalaenoptera musculus brevicaudaSeen in 3 countries in the AtlasData Deficient
Round ribbontail rayTaeniurops meyeniSeen in 18 countries in the AtlasVulnerable
Banded sea krait (yellow-lipped sea krait)Laticauda colubrinaSeen in 18 countries in the AtlasLeast Concern
Blue-lipped sea kraitLaticauda laticaudataSeen in 12 countries in the AtlasLeast Concern
Reef stonefishSynanceia verrucosaSeen in 25 countries in the AtlasLeast Concern
Lionfish (red and common lionfish)Pterois volitans and Pterois milesSeen in 80 countries in the AtlasLeast Concern
ScorpionfishScorpaenopsis speciesSeen in 22 countries in the AtlasVaries by species
Titan triggerfishBalistoides viridescensSeen in 40 countries in the AtlasLeast Concern
Picasso triggerfish (lagoon triggerfish)Rhinecanthus aculeatusSeen in 41 countries in the AtlasLeast Concern
Clown triggerfishBalistoides conspicillumSeen in 29 countries in the AtlasLeast Concern
Day octopusOctopus cyaneaSeen in 35 countries in the AtlasLeast Concern
Mimic octopusThaumoctopus mimicusSeen in 7 countries in the AtlasLeast Concern
Blue-ringed octopusesHapalochlaena spp.Seen in 5 countries in the AtlasLeast Concern
Irrawaddy dolphinOrcaella brevirostrisSeen in 10 countries in the AtlasEndangered
Golden jellyfishMastigias papua etpisoni and other MastigiasSeen in 4 countries in the AtlasNot Evaluated
Tasselled wobbegongEucrossorhinus dasypogonSeen in 2 countries in the AtlasLeast Concern
Raja Ampat epaulette shark (walking shark)Hemiscyllium freycinetiSeen in 1 country in the AtlasNear Threatened
Loggerhead turtleCaretta carettaSeen in 89 countries in the AtlasVulnerable
Blue whaleBalaenoptera musculusSeen in 29 countries in the AtlasEndangered
Sicklefin devil ray (Chilean devil ray)Mobula tarapacanaSeen in 9 countries in the AtlasEndangered
Silvertip sharkCarcharhinus albimarginatusSeen in 28 countries in the AtlasVulnerable
Flatback turtleNatator depressusSeen in 3 countries in the AtlasData Deficient
Bluestreak cleaner wrasseLabroides dimidiatusSeen in 51 countries in the AtlasLeast Concern
Rough-toothed dolphinSteno bredanensisSeen in 36 countries in the AtlasLeast Concern
Silky sharkCarcharhinus falciformisSeen in 48 countries in the AtlasVulnerable
Sicklefin lemon sharkNegaprion acutidensSeen in 11 countries in the AtlasEndangered
Bull sharkCarcharhinus leucasSeen in 30 countries in the AtlasVulnerable
Blacktip sharkCarcharhinus limbatusSeen in 49 countries in the AtlasVulnerable
Portuguese man o' warPhysalia physalisSeen in 36 countries in the AtlasNot Evaluated
Spinetail devil rayMobula mobularSeen in 18 countries in the AtlasCritically Endangered
Common octopusOctopus vulgarisSeen in 32 countries in the AtlasLeast Concern
Smooth hammerheadSphyrna zygaenaSeen in 26 countries in the AtlasVulnerable
Red-tailed tropicbirdPhaethon rubricaudaSeen in 28 countries in the AtlasLeast Concern
Mauve stinger jellyfishPelagia noctilucaSeen in 20 countries in the AtlasNot Evaluated
Great seahorseHippocampus kelloggiSeen in 7 countries in the AtlasVulnerable
Three-spot seahorseHippocampus trimaculatusSeen in 11 countries in the AtlasEndangered
Brown boobySula leucogasterSeen in 104 countries in the AtlasLeast Concern
SailfishIstiophorus platypterusSeen in 31 countries in the AtlasVulnerable
Atlantic bluefin tunaThunnus thynnusSeen in 39 countries in the AtlasLeast Concern
Red-footed boobySula sulaSeen in 91 countries in the AtlasLeast Concern
Silver-cheeked toadfishLagocephalus sceleratusSeen in 19 countries in the AtlasLeast Concern
Bowmouth guitarfishRhina ancylostomaSeen in 8 countries in the AtlasCritically Endangered
Giant trevallyCaranx ignobilisSeen in 33 countries in the AtlasLeast Concern
Robber crab (coconut crab)Birgus latroSeen in 17 countries in the AtlasLives on landVulnerable
Abbott's boobyPapasula abbottiSeen in 4 countries in the AtlasEndangered
Christmas Island frigatebirdFregata andrewsiSeen in 6 countries in the AtlasVulnerableMilk sharkRhizoprionodon acutusSeen in 33 countries in the AtlasVulnerable
Orange-spotted toadfishTorquigener hypselogeneionSeen in 10 countries in the AtlasLeast Concern
Saltwater crocodileCrocodylus porosusSeen in 14 countries in the AtlasLeast Concern
Whitespotted wedgefishRhynchobatus djiddensisSeen in 9 countries in the AtlasCritically Endangered
Great frigatebirdFregata minorSeen in 44 countries in the AtlasLeast Concern
Wilson's storm-petrelOceanites oceanicusSeen in 41 countries in the AtlasLeast Concern
Lesser frigatebirdFregata arielSeen in 39 countries in the AtlasLeast Concern
Common thresherAlopias vulpinusSeen in 16 countries in the AtlasVulnerable
Bulwer's petrelBulweria bulweriiSeen in 17 countries in the AtlasLeast Concern
Swinhoe's storm-petrelHydrobates monorhisSeen in 16 countries in the AtlasNear Threatened
Tahiti petrelPseudobulweria rostrataSeen in 15 countries in the AtlasNear Threatened
Oriental darterAnhinga melanogasterSeen in 14 countries in the AtlasLeast Concern
Spinner sharkCarcharhinus brevipinnaSeen in 14 countries in the AtlasVulnerableBigeye thresherAlopias superciliosusSeen in 13 countries in the AtlasVulnerable
Little cormorantMicrocarbo nigerSeen in 11 countries in the AtlasLeast Concern
Dusky sharkCarcharhinus obscurusSeen in 11 countries in the AtlasEndangered
Pelagic stingrayPteroplatytrygon violaceaSeen in 11 countries in the AtlasLeast Concern
Little pied cormorantMicrocarbo melanoleucosSeen in 10 countries in the AtlasLeast ConcernSpottail sharkCarcharhinus sorrahSeen in 10 countries in the AtlasNear Threatened
Bottlenose wedgefishRhynchobatus australiaeSeen in 9 countries in the AtlasCritically Endangered
Little black cormorantPhalacrocorax sulcirostrisSeen in 7 countries in the AtlasLeast Concern
Coach whipray (reticulate whipray)Himantura uarnakSeen in 7 countries in the AtlasEndangered
Brownbanded bamboo sharkChiloscyllium punctatumSeen in 6 countries in the AtlasNear ThreatenedRead before you go
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