Reefs are incredibly important habitats. They provide a hard surface to which benthic organisms such as corals, kelps and sponges can attach, and once these organisms establish they provide complex 3D structures which can alter the environment by influencing factors such as water flow and the amount of light reaching the seafloor. A healthy reef ecosystem can contain thousands of different species of fish and invertebrates which are well adapted to these unique conditions, and use these habitats for shelter, foraging and recruitment grounds. This crab in the Kimberley Marine Park has made it's home inside a sponge, where it was found hiding with a host of juveniles.

Flatback turtle (Natator depressus)

This map shows the home ranges of the 11 tracked flatback turtles during the inter-nesting period in waters off the Kimberley coast in northwest Australia. The coloured contours represent the 25, 50, 75 and 95 % habitat utilisation distributions of the turtles, and the Australian Marine Park boundaries are shown in black. For more information on about this image see Thums et al. 2017.

A starfish, sponge and crinoid community in the Kimberley Marine Park.

This whale shark was photographed in the Ningaloo Marine Park off Western Australia. Whale sharks are the worlds biggest fish. The name whale shark arose because they are as big as a whale (recorded up to 18 metres) and also filter feed much like many whales. However, whale sharks breath via gills, and have cartilage instead of bone, which makes them a true shark. The Ningaloo Marine Park is a well known for the whale sharks that visit the region from the months of March to July each year. There is still a lot to learn about whalesharks and where they go when they are not at Ningaloo.