The Peel-Harvey Estuary is a vast, shallow estuarine system spanning 136 square kilometers, located approximately 80 kilometers south of Perth in Western Australia's Shire of Murray. It is a highly valued saltwater fishing destination renowned for its productivity and biodiversity. The estuary consists of two main basins—the Peel Inlet and the Harvey Estuary—fed by four main rivers: the Peel, Serpentine, Murray, and Harvey Rivers. It connects to the Indian Ocean through two narrow outlets, including the famous artificial Dawesville Cut. The system is recognized as a Ramsar Wetland of international importance, supporting critical fish breeding and nursery grounds, migratory waterbirds, and unique ecological features.