Rare evidence of a shark eating another in the Great Barrier Reef has surfaced.
Environmental journal Coral Reefs has published an image showing a wobbegong shark eating a brown-banded bamboo shark at Great Keppel Island.
Staff at Coral Reefs spotted the opportunistic kill during a study of the area and said the sight was a rare occurrence.
"During the 30-minute observation period, neither shark moved position and the wobbegong did not further ingest the bamboo shark," the journal said."We assume that it would have taken at least several more hours for the wobbegong to completely consume the bamboo shark."