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  3. Irrawaddy Dolphin

One of the 17 dolphins on WAnimals

Irrawaddy Dolphin (Orcaella brevirostris)

Mammals · Artiodactyla · Delphinidae

Irrawaddy Dolphin

Orcaella brevirostris

Endangered

At very high risk of extinction in the wild in the near future.

Spotted something wrong?

The Irrawaddy dolphin is a cetacean with a rounded head, no beak and a small dorsal fin, occupying shallow coastal waters and also stretches of great rivers such as the Irrawaddy, the Mekong and the Mahakam. The river subpopulations are tiny and on the edge of disappearing. It lives in small groups and feeds on fish and crustaceans, which it sometimes catches by spitting jets of water. Gillnets and electrofishing are the main causes of its mortality.

Weight

90 kg – 150 kg

Size

1.8 m – 2.8 m

Life expectancy

30 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Sighting difficulty

Hard

OceanFreshwater
10countries11parks5dive sites17same family

AI-generated images: illustrations, not photographs.

Fun facts

  • GeneralBeakless with a bulging forehead, it spits jets of water to corral fish.
  • comportamientoIt lives both in coastal waters and in freshwater stretches of the great Asian rivers, and has developed a traditional cooperative fishing relationship with fishermen in Myanmar.
  • In Myanmar there is a centuries-old cooperative fishery: the fishermen tap the water with their oars and the dolphins drive the shoals towards the nets, keeping the fish that escape, a collaboration passed down the generations in both species.
  • It spits jets of water from its mouth, sometimes more than a metre, apparently to herd fish and perhaps also in play.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Estuaries, mangroves, coastal lagoons and stretches of large rivers in South-East Asia
Sexual maturity
5 years
Gestation / incubation
14 months
Litter / clutch size
1

Sources consulted: https://en.wikipedia.org/wiki/Irrawaddy_dolphin

Where to find it

Loading map…

The pins mark the parks and dive sites where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented — showing 15 of 16.

Related species

Other species in the catalogue with the most in common with Irrawaddy Dolphin — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Shares a park
Shares a park

How to help

The irrawaddy dolphin is classified as endangered. Organisations such as the IUCN, WWF and the Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programmes is a good starting point if you want to get involved.

It's documented in 5 protected areas — one reason why protecting these places matters for its conservation.

Keep exploring

Based on what we already know about irrawaddy dolphin.

Comments

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See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano
See its range on the interactive map→
SundarbansIndia
LorentzIndonesia
Sundarbans Forest ReserveBangladesh
Tanjung PutingIndonesia
BhitarkanikaIndia
Gulf of Kutch MarineIndia
WasurIndonesia
Ao Phang NgaThailand
Mu Ko SurinThailand
Ha Long BayVietnam
Con Dao IslandsVietnam
Koh RongCambodia
Con Son Island (North Con Dao)Vietnam
Phu QuocVietnam
Koh Ta KievCambodia
See all 11 parks
Indo-Pacific Humpback DolphinVulnerable

Indo-Pacific Humpback Dolphin

Sousa chinensis

Near Threatened

False Killer Whale

Pseudorca crassidens

Bottlenose DolphinLeast Concern

Bottlenose Dolphin

Tursiops truncatus

Spinner DolphinLeast Concern

Spinner Dolphin

Stenella longirostris

Common Water MonitorNot Evaluated

Common Water Monitor

Varanus salvator

Vulnerable

Blacktip Reef Shark

Carcharhinus melanopterus

CountriesVietnam
ParksSundarbansIndia
TagsCarnivore
Carnivore
Diurnal
Endangered
Ocean
Freshwater
Mammal
Vietnam
India
Indonesia
Cambodia
Thailand
Bangladesh
Bangladesh
Cambodia
India
Indonesia
Laos
Malaysia
Myanmar
Philippines
Thailand
Vietnam