Went there on a school tour years a go... Lots of small Kingies in the shallower part of the estuary to the right. Grunter, River Salmon, River Bream are quite thick and bait collecting is very easy (Mud Prawn).
To the right of the mouth you can get Blacktail, Kob, Cracker, Bronze Bream and many other fish. The fishing is top there, have been wanting to go back ever since the school tour as our "fishing time" was limited.