Ensuring that connectivity and stock dynamics are well understood is crucial to determining the appropriate scale for fisheries management and assessment. There is strong industry interest in determining the extent to which connectivity and stock dynamics of snapper along the west coast might have changed over time reflecting changes in environmental conditions and stock abundance. This project will conduct an array of studies to improve understanding of snapper stock connectivity between the Gascoyne and West Coast Bioregions using high-resolution genomic techniques and identify key recruitment sources. It will quantify snapper egg and larval dispersal between the two Bioregions using high-resolution ocean circulation modelling and evaluate the use of active acoustic methods for monitoring the distribution and abundance of snapper in spawning aggregations. Finally, it will investigate possible changes in key biological parameters in environmental conditions and stock abundance.