Researchers recorded three confirmed sightings of the critically endangered vaquita marina during a May 2026 training cruise in the Upper Gulf of California, according to a statement from CONANP, Mexico’s national commission for natural protected areas. The vaquita marina sighting took place in waters northwest of the designated Zero Tolerance Area and in the adjacent Extension Area, both located off the coast of San Felipe, Baja California. Acoustic detections also confirmed the porpoise’s continued presence in these zones.
The sightings represent rare good news for a species that scientists have repeatedly warned is on the brink of extinction. With population estimates hovering in the single digits for years, each confirmed observation carries weight for the international effort to save the world’s smallest and most endangered cetacean.
From Hundreds to Fewer Than Ten: The Vaquita’s Collapse
The vaquita marina (Phocoena sinus) exists nowhere on Earth except the northern Sea of Cortez. When scientists first described the species in 1958, its population likely numbered in the hundreds. By 1997, researchers estimated roughly 567 individuals remained. Then the decline accelerated dramatically.
The primary killer has been bycatch in gillnets set for another endangered species: the totoaba, a large fish whose swim bladder commands prices of up to $46,000 per kilogram on Chinese black markets. Poachers use gillnets that are nearly invisible underwater, and vaquitas become entangled and drown. Despite a permanent gillnet ban enacted by the Mexican government in 2017, illegal fishing has persisted.
By 2018, scientists estimated fewer than 19 vaquitas survived. A 2023 acoustic survey by an international team suggested as few as 10 to 13 individuals remained. A captive breeding attempt in 2017 ended in failure when a captured female vaquita died of stress, leading scientists to conclude that the species could only be saved in the wild.
The Mexican government established the Zero Tolerance Area, a roughly 225-square-kilometer polygon in the Upper Gulf, where all fishing activity is prohibited. Surrounding it is the larger Extension Area with additional restrictions. Enforcement has been inconsistent, with fishermen, conservation groups, and the Mexican Navy clashing repeatedly over access to these waters. In 2020 and 2021, Sea Shepherd Conservation Society vessels monitoring the area reported confrontations with fishing boats, some involving rock-throwing and Molotov cocktails.
San Felipe Trainees Worked Alongside International Observers
The May 2026 cruise aboard the vessel Seahorse was organized by the Grupo para la Sustentabilidad (GIS) del Alto Golfo de California, a coalition of federal agencies and civil organizations. Young participants from San Felipe completed 22 hours of classroom instruction before spending 10 days at sea. They trained on high-powered binoculars known as Big Eyes and learned systematic survey techniques guided by acoustic detection data.
The trainees also spent two days aboard a Sea Shepherd Conservation vessel learning environmental DNA (eDNA) sampling, a technique that detects traces of genetic material shed by marine animals into the water. eDNA sampling has become an increasingly important tool for vaquita monitoring because it can confirm an animal’s presence without requiring a visual sighting. The trainees worked alongside both Mexican and international observers during the cruise.
CONANP stated that despite adverse weather conditions throughout the expedition, the three visual sightings and accompanying acoustic data confirmed that vaquitas continue to inhabit the monitored areas. “The information gathered confirms that vaquitas remain in these areas, which reinforces the need to strengthen protective actions,” the agency said in its statement.
Fishing Restrictions and Enforcement Shape San Felipe’s Economy
San Felipe, a town of roughly 25,000 residents on the northeastern coast of Baja California, sits at the center of the vaquita conflict. The fishing ban in the Zero Tolerance Area has eliminated traditional livelihoods for many local families. The Mexican government has offered compensation payments and alternative gear programs, but compliance and distribution have been uneven.
For those who fish, boat, or operate ecotourism charters in the Upper Gulf, the restricted zones remain actively enforced. Entering the Zero Tolerance Area without authorization can result in vessel seizure. Recreational boaters transiting the northern Sea of Cortez should verify current boundary coordinates with local port authorities before departing San Felipe.
The scientific team recommended expanding the training program with additional sessions before a planned 2027 observation cruise. They also called for continued eDNA sampling and analysis to track the vaquita’s distribution over time. The 2027 cruise will likely produce the next population estimate, a data point that will determine whether the species still has a viable path to survival. The findings were first reported by La Jornada Baja California.