Port Phillip Bay is a vast, shallow, and biologically rich marine embayment bordering Melbourne, Victoria. It is a drowned river valley formed by geological uplift and subsidence, creating a diverse environment of sandy beaches, rocky reefs, seagrass beds, and deeper channels. This varied habitat supports a wide array of fish species, making it one of Australia's premier marine recreational fishing destinations. The bay offers extensive opportunities for both boat-based and land-based angling, from iconic piers and jetties to expansive offshore reefs.