Port Phillip Bay is a large, shallow bay located in Victoria, Australia. It is bordered by the city of Melbourne to the north and the Mornington Peninsula to the south. The bay covers an area of approximately 1,930 square kilometers and has a maximum depth of about 24 meters. It serves as a vital waterway for shipping, fishing, and recreational activities. The bay is home to diverse marine life, including various fish species, dolphins, and seabirds. Several popular beaches, such as St Kilda Beach and Brighton Beach, line its shores, attracting both locals and tourists. The bay also features numerous parks and reserves, providing opportunities for outdoor activities and nature appreciation.