River Dolphin Conservation and Welfare

Freshwater river dolphins are among the most endangered cetaceans, facing threats from bycatch, river fragmentation, water pollution, and boat strikes that create significant welfare and conservation crises.

Key Facts

Six species of freshwater river dolphins exist; all are threatened or critically endangered.
The baiji (Chinese river dolphin) is considered functionally extinct — the first cetacean driven to extinction in modern times.
Amazon river dolphins (boto) face illegal killing for catfish bait and incidental capture in gillnets.
Indus and Ganges river dolphins are threatened by river fragmentation from dams, which isolates populations.
Entangled individuals in nets may struggle for extended periods before drowning, causing significant welfare harm.
South Asian river dolphins use echolocation rather than vision in the sediment-rich river water they inhabit.
River dolphin populations are now monitored using acoustic surveys to detect their echolocation clicks.

Welfare Considerations

River dolphin welfare is inseparable from river dolphin conservation. The primary welfare harms — entanglement in fishing nets, boat strikes, pollution-related illness, and reproductive disruption from habitat fragmentation — are also the primary conservation threats. Entanglement is of particular welfare concern: dolphins caught in gillnets may struggle for minutes to hours before drowning. By-catch reduction devices (acoustic pingers and net modifications) reduce entanglement without significantly reducing fish catch. River pollution causes skin conditions, respiratory problems, and reduced immune function. Protecting river dolphins requires a holistic approach that addresses water quality, bycatch, boat traffic management, and dam impact mitigation — all of which simultaneously serve welfare and conservation goals.

What You Can Do

Support organizations working to protect Amazon, Ganges, Indus, and Irrawaddy river dolphin populations.
Advocate for river management policies that maintain water flow, quality, and connectivity for freshwater cetaceans.
Support bycatch reduction programs including pinger deployment in river fisheries operating in dolphin habitat.
Oppose dam construction in river dolphin habitat without rigorous assessment of fragmentation impacts.
Avoid purchasing fish products that originate from fisheries with documented river dolphin bycatch.