Blackfish

Ok, I've heard back from a mate.
He's calling it a "Bluelined Shrimpgoby"  Cryptocentrus bulbiceps and that's good enough for me.
Now here's the twist. It maybe the same critter as  a "Y-Bar Shrimpgoby" Cryptocentrus fasciatus 
Though neither seem to be found this far south till both @twoblues and @Scratchie caught them. 

@Holls the experts got back to me and it’s a Port Jackson Glassfish or as Neolm just said, Glassies would be the more common name. 

Rock Cale there gyeatman.
 

It's a Mantis Shrimp there BG.
Now there's lots of different Types, around 125 in Australia so as to that one, got Nuffin mate.
I found them up the NSW coast living in the zone where I've been Beach Worming so they turn up everywhere.
 

I recon its a Sevenbar Groper/ Banded Rock Cod/ Bar Cod all the same "Epinephelus ergastularius"
The Black Rock cod has only a Spot/Saddle on the Tail Wrist where the above has the band all the way.

My guess would be a Striped Cardinalfish (Ostorhinchus fasciatus)
Happy to be corrected though 🙂

Goes by a few common names but its  Black Rabbitfish and those spines are poisonous so be very careful when handling them.

I recon you have a Eastern Frogfish.
Their Whiskery little Tassels they have aren't as prominent when out of the water.

Hard to say because of the state of decomposition, but my guess would also be Estuary Cobbler.
I believe they loose their colour  after they've been dead awhile.

My guess Dave would be Chinaman Rockcod  "Epinephelus rivulets".
Another species for you Dave 👍
 

First one is a Redspot Emperor
Second is what Yowie said. Pikey Bream
Third Javelin Fish
Forth .. not to sure as there is a couple of Croaker/Jewfish species up that way.
 

Looks like a Juvenile Banded Rockcod Epinephelus ergastularius.
Also know as a Seven bar Grouper.

Finally found out this one. 
Darktail Snapper (Orangespotted Sea Perch) "Lutjanus Lemniscatus"
 

Looks like a Eastern Smooth Boxfish,“ Anoplocapros inermis” but I’m not at home so just looking at it on my phone.

My guess it’s a Threadfin Silver Biddy. “ Gerres filamentosus”
 

Hi Berrero, Its a Eastern Striped Grunter ( Pelates sexlineatus) 

Just got word back from the experts.
Piedtip Cucumberfish "Paraulopus okamurai"

I recon.  Rainbow Monocle Bream. (Scolopsis monogramma)

I would guess a some type of Flutemouth/ Cornet fish there BG.
 

Asked people who are far more knowledgeable than I and they call it a Yellowfin Tuna,

Maybe a Longtail Catfish. (Euristmus lepturus)

I personally have never heard them called Brown Spotted Rock Cod.
Certainly Wirrah or Old Boots or the "proper name" if there is such a thing, Eastern Wirrah Cod as there is a Western Wirrah cod.
And as every one said pretty common. Ive never eaten on but my understanding no the best on the plate.

Certainly looks like a Juvenile Black Drummer, juveniles tend to show different colour variations than Adults.

B.M you have there a Striped Scat. Selenotoca multifasciata 

I recon its a Banded SeaPerch. Hypoplectrodes nigroruber.