China has emerged as the world's leading producer of red pacu fish, a species native to the Amazon region and river basins, surpassing countries like Peru, Colombia, Brazil, and Venezuela. The fish, commonly sold online in China for around US$1 per kilogram, was produced in quantities of 59,400 tons in 2020, according to the Food and Agriculture Organization (FAO) of the United Nations. China's dominance in the global fish market is further underscored by its production of 83.9 million metric tons of capture and aquaculture fish in the same year, the highest globally. The article also discusses the challenges Brazil faces in competing in the aquarium market, where it currently relies on wild harvesting rather than cultivation, contrasting with China's advanced captive-rearing techniques.