How much do we really know about what lies beneath Sydney Harbour? | ABC News

Sydney is not called the Harbour City for nothing. Five million people live around it, travel on it and swim in it.
But, did you know there are species in the Harbour that have yet to be discovered? And places that have never been studied?
In the first of a special series on the secrets of Sydney Harbour, Jeremy Fernandez meets a scientist who knows more than most about this extraordinary body of water.
Part 2: Saltwater custodians: • The saltwater custodia...
Part 3: The end of the line: • Sydney's fishing fleet...
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