It includes the tropical coastal waters of the central and southern Great Barrier Reef in northeastern Australia.
It is a provincial level bioregion in the Integrated Marine and Coastal Regionalisation of Australia (IMCRA) system.
It extends from the shore to the edge of the continental shelf, and includes the central and southern portion of the Great Barrier Reef.
On the north it adjoins the Northeast Shelf Transition, which includes the northern portion of the Great Barrier Reef and the Torres Strait.
These include many eastern tropical endemic species, some of which extend into the adjacent transition regions.