The Haringvliet is one of the most productive and expansive predator fisheries in the Netherlands, forming a critical part of the Rhine-Maas delta system in South Holland. This inland waterway stretches approximately 28 kilometers in length and ranges from 800 to 3,150 meters in width, covering more than 4,000 hectares of water. Depths vary considerably across the basin, ranging from 8 to 39 meters, providing a diverse range of underwater habitats for both prey and predator species. The Haringvliet connects directly to the Hollandsdiep to the east and is bounded to the west by the iconic Haringvlietdam, a massive sluice structure that has profoundly shaped the ecology of the entire delta region. Water clarity has improved significantly in recent years, which has shifted the balance of the fishery — favoring pike over zander in many areas, though trophy-sized zander are still very much present. The Haringvliet sits within a broader network of exceptional predator waters that includes the Volkerak and Hollandsdiep, making the entire South Holland delta region a destination of international significance for serious anglers.