Most Sea Turtle Populations Are Rebounding Worldwide, Analysis Finds

Few creatures embody endurance like the sea turtle, which has navigated the oceans for more than 100 million years. After decades in which hunting, fishing nets and disappearing beaches pushed many populations toward collapse, a sweeping scientific assessment delivers a hopeful verdict: most sea turtle populations around the world are now recovering. NOAA Fisheries summarized the findings, drawn from a review of seven sea turtle species published in the journal Nature Reviews Biodiversity.

The numbers are striking. Across roughly 300 population records, scientists found that significant increases were three times more common than significant declines — and when updated 2024 data were folded in, increases outnumbered declines six to one. Four of the five regional populations of green sea turtles are growing. The clearest emblem of recovery comes from Cape Verde, where loggerhead nests surged from about 500 in 2008 to 35,000 by 2020.

“After decades in which hunting, fishing nets and disappearing beaches pushed many populations toward collapse, a sweeping scientific assessment delivers a hopeful verdict: most sea turtle populations around the world are now recovering.”

"When I think of sea turtles, the first word that comes into my mind is resilience," said NOAA Fisheries researcher Jeffrey Seminoff. That resilience has been unlocked by decades of patient, often unglamorous conservation work: dimming artificial lights that disorient hatchlings, requiring devices that let turtles escape fishing nets, curbing the hunting of turtles and their eggs, and protecting the beaches where females return to nest.

The recovery is not universal, and the scientists are careful to say so. Pacific and Caribbean leatherback populations continue to decline, and even rebounding species face climate change, plastic pollution and warming sands that skew the sex ratio of hatchlings. But the overall trend overturns a long-standing narrative of inevitable loss. It shows that when humans remove the pressures driving a species down, even slow-reproducing, ancient animals can climb back — and that sustained conservation, kept up over decades, genuinely works.