River Dolphins: Welfare of Critically Endangered Freshwater Species

Understanding the welfare challenges facing river dolphins — among the most endangered of all cetaceans — in increasingly degraded freshwater ecosystems across South America and Asia.

Key Facts

Six river dolphin species or subspecies exist globally, all of which are threatened or Critically Endangered
The baiji (Yangtze River dolphin) was declared functionally extinct in 2006 — the first cetacean species lost to human activity
Amazon River dolphins (boto) face threats including gold mining mercury contamination, fishing gear entanglement, and deliberate killing for use as catfish bait
The Ganges River dolphin is functionally blind — adapted to navigate turbid river systems through echolocation — and highly vulnerable to gill net entanglement
River dolphins are keystone predators in freshwater ecosystems whose presence indicates healthy fish populations and clean water
South Asian river dolphin populations have declined by 50-80% over the past three generations from a combination of fishing entanglement and river damming

Welfare Considerations

River dolphin welfare represents one of the most urgent conservation welfare challenges globally. These animals face entanglement in fishing gear that causes both immediate injury and prolonged drowning deaths, contamination from mining and agricultural chemicals that impair reproductive health, and habitat degradation from dam construction that fragments the river systems they depend on. The welfare of individual dolphins caught in gill nets — which may entangle animals for extended periods before drowning — is severe and acute. River dolphin conservation requires both direct protection measures and systemic changes to fishing practices, dam construction policies, and mining regulation that address the root causes of population decline.

What You Can Do

Support WWF River Dolphin Program and WCS which work on river dolphin conservation across South America and Asia
Avoid gold and electronics products from supply chains contributing to Amazon or Asian river mining without adequate environmental controls
Support debt-for-nature swap programs that protect Amazon basin habitat and reduce resource extraction pressure on river dolphin habitat
Advocate for international dam construction standards that include freshwater ecosystem and river dolphin impact assessment
Learn about the different river dolphin species and their distinct conservation challenges — awareness drives the advocacy that funds conservation