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Ocean Calling

Ocean Atlas · Indian Ocean

Indian Ocean

Sri Lanka

East-coast reefs with turtles and reef sharks, and blue whales possible from the boat.

Pigeon Island National Park off Nilaveli near Trincomalee, Sri Lanka
Pigeon Island National Park, Trincomalee, Sri Lanka · Photo: Chiranmayu Medis, Wikimedia Commons, CC BY-SA 4.0
Exploring

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: Sri Lanka country profile, IWC Whale Watching Handbook; Maritime tourism: a whale of a gap in regulations, The Morning, Oct 2025; No turtle hatcheries on our Sri Lanka wildlife holidays, Ayu in the Wild.

🧭 Travel advice, checked 30 Sep 2026. The UK FCDO advice for Sri Lanka was updated 21 September 2026. It warns of a heightened terrorism threat, protests that can turn violent, and possible flight disruption via Middle East hubs. Sources: UK FCDO travel advice, Sri Lanka Advice differs by passport: check your own government before you plan.

FreedivingScubaWhalesTurtlesSharks

Why Sri Lanka

At Trincomalee and Nilaveli on the east coast, reefs bring blacktip reef sharks, green and hawksbill turtles, rays, morays and octopus, for freediving and diving. Blue whales, sperm whales and dolphins may be seen from the boat. Late March to April often brings very clear, warm and calm water.

Conservation-led. Ocean Calling guests never chase, touch or bait animals.

IndonesiaSomaliaUnited Arab EmiratesOmanCambodiaThailandLaosMyanmarVietnamIndiaBangladeshPakistanSri LankaChinaMalaysiaBruneiYemenSaudi ArabiaEthiopiaSomalilandTrincomalee and Nilaveli, Sri Lanka

When to go

Mar-Apr. Timing changes by place and by animal, so check each place below.

We have researched this place and keep learning about it. There is no trip here yet.

Our ethics check

Can we travel here ethically?

Ethics pass, with care

Good with the right operator. Here is how we choose.

Sri Lanka has good whale watching rules: boats keep 100 m from whales, and entering the water is not allowed without special approval. But reports from 2024 and 2025 say many boats in Mirissa and Trincomalee still chase whales and put swimmers in the water. Ocean Calling only watches whales and dolphins from a licensed boat that keeps the distance, and freedives on the reefs instead.

Checked 29 Sep 2026. Places change, so we look again every year.

Sources for this check
Places we are exploring

Where in Sri Lanka

Short notes from our research. Wildlife is never guaranteed.

Trincomalee and Nilaveli

Exploring

East-coast reefs with blacktip reef sharks and turtles, and whales and dolphins seen from the boat.

🤿 In the water: Blacktip reef sharks, Green and hawksbill turtles, Reef fish and rays, Morays and octopus, Nudibranchs

⛵ From the boat or shore, never in the water: Blue whales, Sperm whales, Spinner dolphins (regular, from the boat), Bottlenose dolphins (occasional)

When: Mar-Apr. Late March to April often brings very clear, warm and calm water.

Rules and fees: Swimming with whales is not allowed without special approval. Ocean Calling does not offer it. Whales and dolphins are watched from a licensed boat that keeps the distance.

Animals

Animals recorded in Sri Lanka

Tap an animal to learn how it lives, where it travels and how to meet it respectfully.

Oceanic whitetip shark with pilot fish in sunlit Red Sea waterOceanic whitetip sharkCarcharhinus longimanusSeen in 43 countries in the AtlasCritically EndangeredSperm whale mother raising her fluke beside her calf off DominicaSperm whalePhyseter macrocephalusSeen in 114 countries in the AtlasVulnerableTwo rough-toothed dolphins leaping together, blotchy grey skin visibleRough-toothed dolphinSteno bredanensisSeen in 36 countries in the AtlasLeast ConcernStriped dolphin leaping, dark flank stripe clearly visibleStriped dolphinStenella coeruleoalbaSeen in 43 countries in the AtlasLeast ConcernOlive ridley turtles nesting on Playa Ostional, Costa RicaOlive ridley turtleLepidochelys olivaceaSeen in 40 countries in the AtlasVulnerableBryde’s whale surfacing and exhaling in deep blue open oceanBryde's whaleBalaenoptera edeniSeen in 36 countries in the AtlasLeast ConcernBlue whale blowing a tall spout off San DiegoBlue whaleBalaenoptera musculusSeen in 29 countries in the AtlasEndangeredCommon bottlenose dolphin swimming over a seagrass bedCommon bottlenose dolphinTursiops truncatusSeen in 89 countries in the AtlasLeast ConcernTwo spinner dolphins swimming over sand in clear waterSpinner dolphinStenella longirostrisSeen in 66 countries in the AtlasLeast ConcernRed lionfish with spread fins over sand in Dauin, PhilippinesLionfish (red and common lionfish)Pterois volitans and Pterois milesSeen in 80 countries in the AtlasLeast ConcernWell camouflaged scorpionfish on dark sand in Lembeh StraitScorpionfishScorpaenopsis speciesSeen in 22 countries in the AtlasVaries by speciesTitan triggerfish swimming over a reef slope in blue waterTitan triggerfishBalistoides viridescensSeen in 40 countries in the AtlasLeast ConcernPicasso triggerfish with painted pattern over sand in the MaldivesPicasso triggerfish (lagoon triggerfish)Rhinecanthus aculeatusSeen in 41 countries in the AtlasLeast ConcernGreen turtle resting on the reef, shell and head pattern in sharp detailGreen turtleChelonia mydasSeen in 103 countries in the AtlasLeast ConcernHawksbill turtle swimming, pointed beak in profileHawksbill turtleEretmochelys imbricataSeen in 88 countries in the AtlasCritically EndangeredTwo blacktip reef sharks swimming over sunlit sand in turquoise waterBlacktip reef sharkCarcharhinus melanopterusSeen in 38 countries in the AtlasVulnerableWhitetip reef sharks resting stacked in a reef creviceWhitetip reef sharkTriaenodon obesusSeen in 43 countries in the AtlasVulnerableHuge spotted whale shark gliding through open blue waterWhale sharkRhincodon typusSeen in 54 countries in the AtlasEndangeredSilky shark swimming near the surface in blue waterSilky sharkCarcharhinus falciformisSeen in 48 countries in the AtlasVulnerableScalloped hammerhead shark cruising in deep blue Red Sea waterScalloped hammerheadSphyrna lewiniSeen in 57 countries in the AtlasCritically EndangeredGreat hammerhead seen from above over rippled white sandGreat hammerheadSphyrna mokarranSeen in 20 countries in the AtlasCritically EndangeredSmooth hammerhead swimming in clear blue open water off SpainSmooth hammerheadSphyrna zygaenaSeen in 26 countries in the AtlasVulnerableTiger shark with clear stripes swimming over a reefTiger sharkGaleocerdo cuvierSeen in 47 countries in the AtlasNear ThreatenedGiant oceanic manta with T-shaped white shoulder patches and remorasOceanic manta ray (giant manta)Mobula birostrisSeen in 31 countries in the AtlasEndangeredLeatherback hatchling crossing the sand toward the seaLeatherback turtleDermochelys coriaceaSeen in 76 countries in the AtlasVulnerableOrcas surfacing close together in calm Arctic Norwegian watersOrca (killer whale)Orcinus orcaSeen in 55 countries in the AtlasData DeficientBlue shark swimming in open blue water off the Azores with a diver in the backgroundBlue sharkPrionace glaucaSeen in 50 countries in the AtlasNear ThreatenedShortfin mako shark at Condor Bank in the North Atlantic, AzoresShortfin makoIsurus oxyrinchusSeen in 40 countries in the AtlasEndangeredLoggerhead turtle at the surface feeding on Portuguese man o' warLoggerhead turtleCaretta carettaSeen in 89 countries in the AtlasVulnerableSchool of bigeye trevally swirling near the seabed at AmedBigeye trevallyCaranx sexfasciatusSeen in 48 countries in the AtlasLeast ConcernFin whale surfacing, showing its white right lower jawFin whaleBalaenoptera physalusSeen in 37 countries in the AtlasVulnerableBlue-spotted maskray resting on a sandy seabed beside a shellBlue-spotted stingrayNeotrygon kuhlii complexSeen in 15 countries in the AtlasVaries by speciesScarred Risso's dolphin spyhopping out of the waterRisso's dolphinGrampus griseusSeen in 56 countries in the AtlasLeast ConcernFalse killer whale surging through blue water off Rota, Mariana IslandsFalse killer whalePseudorca crassidensSeen in 41 countries in the AtlasNear ThreatenedBluestreak cleaner wrasse with black stripe and blue tailBluestreak cleaner wrasseLabroides dimidiatusSeen in 51 countries in the AtlasLeast ConcernCuvier's beaked whale surfacing, pale scarred head and small dorsal finCuvier's beaked whaleZiphius cavirostrisSeen in 42 countries in the AtlasLeast ConcernPod of bottlenose dolphins swimming over a Red Sea coral reefIndo-Pacific bottlenose dolphinTursiops aduncusSeen in 29 countries in the AtlasNear ThreatenedBull shark swimming in clear blue water off Quintana Roo, MexicoBull sharkCarcharhinus leucasSeen in 30 countries in the AtlasVulnerableTwo pygmy sperm whales at the sea surface off the Azores, low backs and small hooked dorsal fins showingPygmy sperm whaleKogia brevicepsSeen in 23 countries in the AtlasLeast ConcernWedge-tailed shearwaters resting togetherWedge-tailed shearwaterArdenna pacificaSeen in 46 countries in the AtlasLeast ConcernMasked booby on Ascension IslandMasked boobySula dactylatraSeen in 80 countries in the AtlasLeast ConcernAdult brown booby standing on a rock with its bill open against blue sky, PrincipeBrown boobySula leucogasterSeen in 104 countries in the AtlasLeast ConcernGiant trevally swimming close to a coral head, with small reef fish in blue water behind itGiant trevallyCaranx ignobilisSeen in 33 countries in the AtlasLeast ConcernMilk sharkRhizoprionodon acutusSeen in 33 countries in the AtlasVulnerableSaltwater crocodile resting on a muddy bank beside mangrove rootsSaltwater crocodileCrocodylus porosusSeen in 14 countries in the AtlasLeast ConcernGreat cormorant perched on a branch, with white head plumes and a glossy blue-black backGreat cormorantPhalacrocorax carboSeen in 90 countries in the AtlasLeast ConcernHuge flock of sooty shearwaters flying low over the sea beside a rocky coastSooty shearwaterArdenna griseaSeen in 53 countries in the AtlasNear ThreatenedWilson's storm-petrel resting on calm water with its wings raised above its backWilson's storm-petrelOceanites oceanicusSeen in 41 countries in the AtlasLeast ConcernLesser frigatebird soaring against a blue sky with its wings spread and tail forkedLesser frigatebirdFregata arielSeen in 39 countries in the AtlasLeast ConcernShort-tailed shearwater resting on the open seaShort-tailed shearwaterArdenna tenuirostrisSeen in 24 countries in the AtlasLeast ConcernSwinhoe's storm-petrel flying low over a grey sea, seen at a distanceSwinhoe's storm-petrelHydrobates monorhisSeen in 16 countries in the AtlasNear ThreatenedOriental darter lifting its head and bill out of the water with a catchOriental darterAnhinga melanogasterSeen in 14 countries in the AtlasLeast ConcernLittle cormorant perched among mangrove branches with its wings spreadLittle cormorantMicrocarbo nigerSeen in 11 countries in the AtlasLeast ConcernIndian cormorant perched beside water, showing its blue eye and scalloped feathersIndian cormorantPhalacrocorax fuscicollisSeen in 8 countries in the AtlasLeast Concern

Read before you go

Responsible travel and conservationCoral Reefs and the Rules: Moʻorea and Sri LankaRead ↗Whales and wildlife ethicsLovina Dolphins: What to Know Before a Sunrise Boat TripRead ↗Planning and destinationsSri Lanka's Blue Whale Season: What Ethical Viewing Actually Looks LikeRead ↗Planning and destinationsThe Season Nobody Tells You About: Sri Lanka's Shoulder Months for Ocean TravelRead ↗Planning and destinationsA Day in the Life of an Ocean Calling Retreat in Sri LankaRead ↗Whales and wildlife ethicsWhales in Sri Lanka: what is legal and what is being soldRead ↗
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