This postal numismatic cover commemorates the Australian Big Things as a significant aspect of Collecting Month 2023, prominently showcasing the Giant Murray Cod $1 coin.

Residing within the city of Swan Hill, the Giant Murray Cod stands as a tribute to the iconic indigenous fish species. With dimensions measuring fifteen meters in length, three meters in width, and reaching a height of five meters, this structure, composed of steel and fiberglass, fulfills multiple roles—it serves as a representation of civic pride, an appealing spot for tourist photographs, and a poignant reminder of the diminishing numbers of this once-abundant species in the Murray-Darling River system