Queensland State Archives posted a photo:
The blue-spotted Rock Cod is brown to orange-brown with numerous small blue spots on the head, body and fins. Each spot has a black margin and is surrounded by a white “halo”
Rockcods and groupers are found worldwide in tropical and temperate marine water. Many are large fishes that live in association with coral reefs, but species are also found on rocky reefs in cooler regions. Worldwide, there are about 160 species. In Australia, about 70 species are known.
Queensland State Archives, Digital Image ID 6211