Integrated Marine and Coastal Regionalisation of Australia

[2] The benthic bioregionalisation incorporates three separate regionalisations:[2] The pelagic bioregionalisation divides the continental shelf into four provincial bioregions based on pelagic fish species biodiversity and richness.

[2] This is a list of IMCRA 4.0 provincial bioregions:[3] There are 1,334 separate geomorphic units in Australia’s waters, in 14 categories.

[2] Geomorphic features are determined by bathymetric models (depth analysis) of the ocean floor and provide an important predictor of species assemblages at a large scale.

For example, different species will occur on low-gradient terraces compared to those on the steep-walled submarine canyons.

[4] Nomenclature of geomorphic features are based on definitions endorsed by the International Hydrographic Organization (IHO, 2001).