Not been able to fish or make fire in a place like Tasmania if you are living a hunter gather lifestyle is quite a loss. We know from the archaeological record

Not been able to fish or make fire in a place like Tasmania if you are living a hunter gather lifestyle is quite a loss. We know from the archaeological record that the Tasmanian aboriginal population was able to fish for thousands of years after the sea level rose and cutoff Tasmanian from mainland Australia. No one really know why, but after thousands of years of fishing they somehow lost the knowledge of how to catch fish. If something as useful as fishing is lost (the seas around Tasmania teem with fish) then how likely is it that a folk tale would be passed down for 10,000 years by oral tradition.