Daily The Guardian writes about this:
Two sea turtles have been released into the waters of Queensland’s Great Barrier Reef after being rehabilitated in captivity. One of the animals was thought to have been hit by a boat and attacked by a crocodile. Both spent time in a dedicated turtle hospital at the Reef HQ aquarium. In recent years warnings over the impact of coastal industrialisation on turtles and other animals have increased, with seabed dredging to allow the export Queensland’s natural resources of particular concern.