Eastern freshwater cod in turn are a species of " Maccullochella " cod found in east coast drainages and originating from Murray cod, " Maccullochella peelii ", that crossed the Great Dividing Range and entered east coast drainages from a river capture event between 0.62 and 1.62 million years ago ( mean estimate 1.1 million years ago ).
22.
Near New Street, the creek once turned and flowed south of Maroondah Highway down the now dry bed of the upper Heatherdale Creek and into the Dandenong Creek and Port Philip Bay, but a natural'river capture'has now taken the waters of the creek and diverted them through a narrow gap in the hills to the north and the Yarra River.
