Well my 2 cents worth...….. I have lived in Brisbane all my life 58 years and have fished it from a child as well as hundreds of trips to Hervey Bay. I do agree with bag limits at present and as said above for many fisherman it is never or rarely reached. Qld government has introduced green zones, go slow zones etc and yes there are soo many more people fishing these days with better equipment. what needs to occur in my opinion is the immediate stop to commercial fishing in the bay and the Brisbane river by this I mean trawling and netting. Many years ago this type of fishing was stopped at Hervey bay and within about five years fisho's could again catch a mackeral and other species without having to travel to o far. Have a look in the Brisbane river on a week day at the trawlers and the mud slick they leave behind. I don't have all the answers but smashing the bay and the river heavily 5 days a week need to stop.
Mangrove protection green zones and more artificial structures are all needed but it appears we are too slow with acting on these so add these and stop that and maybe just maybe good fishing might return to Moreton Bay. Just imagine if most recreational fisherman could not catch fish on most outings what would happen to the supporting industries boats, tackle, bait, trailers, repairs to all mentioned.