November 11, 2025 — Scientists surveying the Upper Gulf of California for the critically endangered vaquita porpoise have confirmed sightings of between 7 to 10 individuals and the birth of new calves, a slight increase from the 2024 survey, which marked the lowest results ever recorded.
Found only in the Northern Gulf of California off the coast of Mexico, the vaquita porpoise is among the planet’s most endangered species. The population has seen a steady decline since its first survey in 1997, when scientists estimated roughly 567 individuals. By 2024, that number had fallen to just eight – the lowest level ever documented – with no sightings of newly born calves.