Hey BA,
Yep, we get some different species over here. Baldchin Groper (Baldies) are WA only. I think they come from the same family as the Blackspot Tuskfish (also called "Bluebone" over here). The Dhufish is the Western Australian Jewfish, although everyone incorrectly calls then "Dhuies".
Up north where our fishing is awesome we get a lot of same species as you guys including the coral trout and parroties etc.
Dhufish
Baldchin Groper
Both are excellent table fish with the Dhufish being one of the most expensive fish in WA. Often found selling at around +/- $80/kilo
I have dived the GBR once off Cairns (Hastings reef) but it was whilst blowing bubbles and before I started spearing. The fish life was awesome as you suggest. I'd love to bring my gear over next time.
If ever you want to try some WA spearing action, give me a call and we'll hook up the boat and drive north

or jump on a boat with some of the club guys and head out to some of the outer banks (40 odd miles) for some big action

Cheers mate,