Five years ago, China did something unprecedented: it banned all fishing in the Yangtze River.
Not reduced it. Not regulated it. Banned it entirely — recalling over 111,000 fishing vessels, resettling 231,000 fishers, and investing more than US$2.7 billion in what became the most ambitious freshwater conservation programme in human history.
At the time, many questioned whether such a drastic measure could work. The Yangtze, Asia's longest river at 6,300 kilometres, had been fished continuously for thousands of years. Its ecosystem was in crisis — overfishing had decimated fish populations, pollution had degraded water quality, and the Yangtze's most iconic species were vanishing. The Chinese paddlefish, once the world's largest freshwater fish, was declared extinct in 2022.
Now, halfway through the ten-year ban, the results are in. And they're extraordinary.
A comprehensive study published in February 2026, comparing pre-ban data (2018-2020) with post-ban monitoring (2021-2023), found that total fish biomass in the Yangtze increased by a median of 209% — effectively more than tripling. Species richness rose by 13%. Larger fish — those over 20cm — showed biomass gains of 232%.
The fish aren't just more numerous. They're healthier. Researchers documented improvements in body condition across multiple species, indicating better-nourished, more robust fish populations throughout the river system.
Perhaps most encouragingly, the recovery is reaching endangered species. The Yangtze finless porpoise — the river's only remaining freshwater mammal, and a species that had been in steep decline — saw its population increase by approximately 33% between 2017 and 2022. With more fish to eat and no fishing nets to become entangled in, the porpoises are thriving.
Migratory and threatened fish species are also showing initial signs of recovery. The slender tongue sole and the Chinese sucker, both species of conservation concern, have been recorded in greater numbers.
The ban hasn't been without controversy or cost. Hundreds of thousands of people lost their livelihoods, and the resettlement programme — while massive in scale — has faced criticism over implementation. Illegal fishing continues to be a challenge, requiring ongoing enforcement.
But the ecological signal is unmistakable: when you give nature space, it recovers. Faster than most models predicted.
The fishing ban is scheduled to run until 2030. Scientists will continue monitoring the river to assess whether the recovery is sustainable long-term and whether populations of critically endangered species can rebuild to viable levels.
For now, though, the Yangtze is telling a story of hope. A river that was dying is coming back to life. Fish that had nearly vanished are multiplying. Porpoises are playing in waters they'd been disappearing from.
Sometimes the most powerful thing humans can do for nature is simply step back. 🐟