Maps used throughout the Representative Areas Program

  • Reef Morphology and Tidal Range in the Great Barrier Reef World Heritage Area - In 1982, Professor David Hopley classified the reefs within the Great Barrier Reef Marine Park into ten classes according to their physical shape and level of development. He linked these to the growth of the reefs over geological time-scales – especially the last 10 000 years. Tidal ranges are also shown on this map.
  • Broad Sediment Sizes Classes in the Great Barrier Reef World Heritage Area - Physical factors such as sediment grain size can influence the distribution and abundance of organisms. The sediment grain size data shown in this map was compiled by Dr Chris Jenkins of the Ocean Science Institute, University of Sydney.
  • Sediment Composition in the Great Barrier Reef World Heritage Area - Map showing the occurrence of calcareous sediments and biota in sediment samples.
  • Regionalisation of Sponge Fauna based upon Classification Analysis - The sponge fauna regionalisation was derived from statistical ‘classification analysis’, which groups sites according to the (sponge) taxa that have been found there. The result divides the Marine Park into 10 regions. The boundaries between some of these regions are more ‘fuzzy’ than others, as indicated on the map.
  • Delphic Reef Regionalisation - This regionalisation, based on expert opinion in 1996, was one of the inputs to the Representative Areas Program Bioregions. Reefs were classified by experts using their knowledge and perception of the spatial patterns of hard corals, reef fishes, and other reef biota.
    • Free Zoning Maps

      Zoning maps

      If you're heading out on the water, don't forget your free Zoning Map so you know where you can go and what you can do.

    • Important milestone

      40 years anniversary

      We're delighted to celebrate the 40 years of the managing the Great Barrier Reef.

    • Visit the Reef

      fish on reef

      Visit our Great Barrier Reef and discover its amazing animals, plants, and habitats.

    • What you can do

      purple coral

      Everyone has a role to play in protecting our Great Barrier Reef. Find out what you can do to help protect this great Australian icon.

    • Report marine strandings


      If you see sick, dead or stranded marine animals please call RSPCA QLD 1300 ANIMAL (1300 264 625)

    • Climate Change and the Great Barrier Reef

      Climate Change and the Great Barrier Reef vulnerability assessment cover image

      A Vulnerability Assessment: of the issues that could have far-reaching consequences for the Great Barrier Reef.