Wild Vaquita: The World's Most Endangered Marine Mammal

The vaquita porpoise is critically endangered with fewer than 10 individuals remaining, driven to the edge of extinction by bycatch in illegal gillnets set for the totoaba fish in the Gulf of California.

Key Facts

The vaquita (Phocoena sinus) is found only in the northern Gulf of California and is the world's smallest cetacean.
Population estimates have plummeted from around 600 in 1997 to fewer than 10 individuals by the mid-2020s.
Vaquitas drown as bycatch in gillnets set illegally for the totoaba fish, whose swim bladder is prized in China.
A 2017 attempt to capture vaquitas for an ex situ breeding programme was abandoned after one individual died of stress.
The Mexican government established a gillnet ban in 2017 but enforcement has been insufficient to halt decline.
Totoaba bladders sell for tens of thousands of dollars each on Chinese black markets, driving persistent poaching.
Conservation experts disagree on whether capture for a breeding programme remains viable given the population size.

Welfare Considerations

The vaquita's situation raises profound welfare questions at the intersection of individual animal welfare and species survival. Capture for ex situ breeding causes acute stress that may be fatal to the remaining individuals, as tragically demonstrated in 2017. Yet leaving the animals in a habitat where illegal gillnetting continues risks extinction through bycatch. Individual welfare and population survival are in direct tension. The most welfare-respecting path forward is aggressive enforcement of the gillnet ban and elimination of totoaba demand in consuming markets — interventions that protect individuals without the acute welfare costs of capture.

What You Can Do

Support Sea Shepherd and WWF Mexico in their vaquita and totoaba anti-poaching patrols.
Advocate for Mexican government enforcement of the gillnet ban in the vaquita refuge zone.
Support demand reduction campaigns targeting totoaba swim bladder in Chinese markets.
Donate to organisations supporting sustainable livelihoods for fishing communities in the vaquita range.