Sad to see this sort of thing happening, but as they say " progress ".
With due respect, the Raby Bay Marina is and will produce very good fish. Bream, Trevally, Mangrove Jack and Squire. Tailor have shown their heads there. Mullet are around and Cuttlefish and Squid. It is true that the mangroves can't be replaced, but the fish ( mother nature ) seems to be adapting. Go down to the boardwalk on a cold winters night, peeled prawn in hand, and get ready to be surprised.