IMCRA, IMCRA regions
The Interim Marine and Coastal Regionalisation for Australia (IMCRA)  is a near-shore regionalisation that consists of 60 meso-scale regions (100-1000’s of km) that cover the area between the coast and the edge of the continental shelf around Australia. IMCRA was based mainly on fish (pelagic and demersal) diversity and species richness data, and has been adopted both nationally and internationally.
Figure 4 on the near-pristine estuaries page is an interactive map that enables users to enlarge and view the states (or parts of states) and the coastal IMCRA regions found there.
IMCRA Technical Group 1998. Interim M long microtidal estuaries 
ersion 3.3. Interim Marine and Coastal Regionalisation for Australia Technical Group, the Department of Environment, Water, Heritage and the Arts, Commonwealth Government, Department of the Environment, Canberra. More information