Understanding the demographic characteristics, connectivity and stock structure of a fish species is crucial for identifying the appropriate scale and strategy for management. Black bream is a slow growing and long-lived finfish species with reproduction confined to estuarine habitats distributed in the estuaries and inshore marine waters of southern Australia. Throughout its broad distribution, black bream is thought to be composed of a number of isolated spawning stocks, with limited evidence of movements between estuaries. In South Australia (SA), black bream supports important commercial fisheries, and is highly sought-after by recreational anglers. Most of the State-wide commercial catch in SA is taken by the Lakes and Coorong Fishery (LCF) in the Coorong estuary. In 2016, the LCF for black bream was classified as ‘overfished’. It is unknown whether this status reflects the broader population in SA waters, or if current management arrangements for the Coorong population are adequate. This investment will define stocks of black bream in southern Australia including demography, connectivity and stock structure to assist in identifying appropriate scales and strategies for management.