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Irrawaddy Dolphin

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description Irrawaddy Dolphin Overview

The Irrawaddy dolphin (Orcaella brevirostris) is a euryhaline cetacean found in coastal areas, estuaries, and major river systems across Southeast Asia. It is distinctly noted for its bulging forehead and the lack of a prominent beak, giving it a physical resemblance to the beluga whale. This species is classified as vulnerable, with populations facing severe threats from entanglement in fishing nets and habitat degradation. They are known for their unique ability to spit streams of water, a technique used to herd fish during hunting.

help Irrawaddy Dolphin FAQ

Why does the Irrawaddy dolphin look different from other dolphins?

The Irrawaddy dolphin (*Orcaella brevirostris*) lacks the long, pointed beak typically associated with dolphins and instead has a distinctive bulging forehead. This unique facial structure makes it visually resemble a small beluga whale. Its flexible neck allows it to move its head in various directions unlike most oceanic dolphins.

Can Irrawaddy dolphins live in freshwater?

Yes, Irrawaddy dolphins are euryhaline, meaning they can easily thrive in both freshwater and saltwater environments. They are famously found in the muddy rivers of Southeast Asia, including the Mekong and the Ayeyarwady River. Some populations also inhabit coastal marine areas and estuaries.

How do Irrawaddy dolphins hunt for food?

They often use a unique cooperative hunting technique by spitting water to herd schools of fish toward waiting fishermen or fellow pod members. In the Ayeyarwady River, they have a documented, symbiotic fishing relationship with local cast-net fishermen. The dolphins benefit from the fish that escape the nets, while the fishermen catch more fish.

What is the conservation status of the Irrawaddy dolphin?

The Irrawaddy dolphin is currently classified as Endangered on the IUCN Red List, with several subpopulations critically endangered. They face severe threats from gillnet entanglement, dynamite fishing, and habitat loss throughout Southeast Asia. There are only an estimated few thousand of these unique dolphins left in the wild.

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