China used a 480m fish bypass channel to solve migratory habitat blockage on a 134km canal; the result transformed fragmented waterways into thriving aquatic corridors

China’s 480-meter fish bypass is turning an engineering barrier into a route for wildlife. Built alongside a 134-kilometer canal, the passage helps migratory fish move between habitats that had become separated by human infrastructure. Instead of changing the entire waterway, engineers created a dedicated corridor where fish can navigate around the blockage. That small intervention has a larger ecological purpose. Connected waterways give fish access to breeding, feeding and seasonal habitats.