Murray cod is Australia's largest freshwater fish. This type of fish is much sought-after by fishing enthusiasts. It is also a popular food fish. Some specimens weigh as much as 200 pounds (90 kilograms), and specimens of 65 pounds (30 kilograms) are not uncommon. Murray cod live throughout the entire Murray-Darling river system. They are also found in the Mary River in Queensland, the Clarence and Richmond rivers in New South Wales, and the waters of dams.