The Nieuwe Merwede is a significant river channel in the southwestern Netherlands, forming part of the Rhine-Meuse-Scheldt delta system. Flowing through a landscape shaped by centuries of water management and engineering, it connects to the Hollandsdiep and Haringvliet, creating an expansive network of waterways that supports a diverse range of fish species. The river is a notable venue for predator fishing, having hosted competitive angling events that draw participants from across the region. Its waters move through a dynamic estuarine environment where freshwater and tidal influences interact, producing varied habitat conditions that attract both resident and migratory fish throughout the year.