In the auditorium of the Pantanal Biopark in Campo Grande, Brazil, five Amazon nations gathered to announce a historic agreement: the first coordinated protection plan for two of the world's most extraordinary migratory fish, the gilded catfish and the Laulao catfish, which undertake journeys spanning up to 12,000 kilometers over their lifetimes.
The moment carried weight. Rita Mesquita, secretary of biodiversity for Brazil's environment ministry, opened the discussion at the 15th U.N. Conference on Migratory Species with a sobering observation: "The numbers are chilling." The alarm was warranted. When scientists last comprehensively assessed freshwater fish in 2011, they examined 3,000 species. This new analysis, presented at the March conference in Mato Grosso do Sul, expanded to 15,000 species—and found that of the 349 migratory fish species identified worldwide, nearly all face serious threats. The two Amazonian catfish tell a particularly grim story: their populations have plummeted 90 percent since the 1970s.
What makes these catfish—the dourada and piramutaba in Portuguese—ecologically essential is their dependence on pristine river corridors. Unlike many species that thrive in fragmented habitats, these giants require unbroken connections across vast stretches of the Amazon Basin to complete their life cycles. They spawn in one region, drift as juveniles downstream, mature in estuaries, and return inland to breed again. This cycle depends entirely on rivers flowing free and unobstructed.
That connectivity is under siege. Dams proliferate across South American waterways, diverting rivers for irrigation and blocking migration routes entirely. Overfishing along the journey adds relentless pressure. Shipping traffic churns waters where these catfish once thrived undisturbed. The convergence of these threats makes the new protection plan significant: the five range countries—Brazil, Bolivia, Colombia, Ecuador, and Peru—have committed to coordinated conservation measures that recognize these fish do not respect borders and cannot be saved by any single nation acting alone.
The announcement came as part of a broader reckoning with freshwater fish conservation. The U.N. Convention on Migratory Species, signed by 132 nations and the European Union, recommended that 325 fish species be added to its protective appendices. Prior to this conference, only 58 fish species worldwide held such protections. The gilded catfish and Laulao catfish, along with other species like the spotted sorubim that fills Brazilian markets, now join that list, triggering binding conservation commitments from signatory countries.
Zeb Hogan, the lead author of the report and an ecologist at the University of Nevada, identified South America as the region best positioned for immediate action. "Many of its basins have preserved river connectivity, including parts of the Amazon biome, home to fish that migrate vast distances," he told conference delegates. That preservation remains fragile—dams continue advancing—but it offers hope that decisive action now could reverse the collapse.
For millions of people across the Amazon Basin, these fish are not abstract ecological concerns. They are dinner. They are livelihoods. They are cultural anchors. Protecting their migrations means protecting food security and the intricate web of life that depends on flowing rivers. The agreement signals that five nations understand this interconnection and are willing to work together to preserve it.