Irrawaddy dolphins prefer coastal areas, particularly muddy, brackish waters at river mouths and deltas, and do not appear to venture far offshore. Most sightings have been made within 1.6 km of the coastline, but some have been reported in waters greater than 5 km from shore.
http://animaldiversity.org/accounts/Orcaella_brevirostris/
Irrawaddy dolphins (Orcaella brevirostris) are found throughout much of the tropical and subtropical Indo-Pacific region; along the coasts of India, Bangladesh, Myanmar (Burma), Thailand, Cambodia (Kampuchea), Lao Peoples' Democratic Republic (Laos), Socialist Republic of Vietnam, Malaysia, Singapore, Brunei Darrusalam, and Indonesia.
http://animaldiversity.org/accounts/Orcaella_brevirostris/
The face and head are similar in appearance to beluga whales (Delphinapterus leucas). Irrawaddy dolphins have narrow, pointed, peg-like teeth about 1 cm in length in both the upper and lower jaws. Body mass varies from 114 kg to 143 kg and the length ranges from 146 cm to 275 cm. Males tend to be larger in mass and length, with a larger dorsal fin.
http://animaldiversity.org/accounts/Orcaella_brevirostris/
The Irrawaddy dolphin (Orcaella brevirostris) is a euryhaline species of oceanic dolphin found in discontinuous subpopulations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and Southeast Asia.
https://en.wikipedia.org/wiki/Irrawaddy_dolphin
Researchers from the New York-based Wildlife Conservation Society (WCS) said they have found nearly 6,000 Irrawaddy dolphins living in the freshwater regions of Bangladesh's Sundarbans mangrove forest and nearby waters in the Bay of Bengal.
https://www.theguardian.com/environment/2009/apr/01/irrawaddy-dolphin
By Rachel Schwartz. Dolphins live in diverse climates and in both marine and freshwater biomes. Biomes are ecological communities divided into six main types: marine, freshwater, desert, forest, grassland and tundra. Each type of dolphin lives in the climate and biome for which it has physically adapted. Although some dolphins thrive in tropical oceans, others live in colder waters. Some species are even found in rivers. Several types of dolphins live in freshwater rivers.
https://www.cuteness.com/article/dolphins-biomes-climate
The Irrawaddy Dolphin. Location: Irrawaddy dolphins live in the the oceans brackish. water near coasts and river mouths, as well as estuaries There. are also a few small populations living in the Ganges, Mekong, and Irrawaddy rivers.
http://bkei-irrawaddy-dolphin.weebly.com/biome-food-chain.html
Though most animals can only visit freshwater for a bit, The Irrawaddy dolphin makes a home in both salt and freshwater bodies. What is the Climate: Since it lives in a tropic/sub-tropic area, the water is very warm and the surface is humid, so it very ventures to colder regions.
http://bkei-irrawaddy-dolphin.weebly.com/biome-food-chain.html
Irrawaddy dolphins are getting rarer and rarer in that part of the world. To find 6,000 isn't huge – but it's significant – and it does show that when you look for something and survey properly you can get some interesting findings.
https://www.theguardian.com/environment/2009/apr/01/irrawaddy-dolphin
Thousands of rare Irrawaddy dolphins found along Bangladesh coast. New study shows that today 6,000 Irrawaddy dolphins are alive and swimming in Bangladesh. Conservationists claim to have found thousands of rare Irrawaddy dolphins on the Bangladesh coast, but warn that the newly discovered population is under threat from climate change and fishing.
https://www.theguardian.com/environment/2009/apr/01/irrawaddy-dolphin
what climate does the irrawaddy dolphin live in
The Irrawaddy dolphin lives in a tropic/sub-tropic area. the Irrawaddy dolphin lives in a tropic and sub-tropic area.