Good water quality is the reason why the Great Barrier Reef is one of the most beautiful, diverse and complex ecosystems in the world. Reefs grow best in waters that have naturally low concentrations of nutrients (nitrogen and phosphorus) and sediments. Due to costal development, agriculture, mining and ports, there has been an increased sediment run-off from land.

Fishing on the Great Barrier Reef is an important pastime and a source of income for both Queensland coastal communities and the seafood industry. The Great Barrier Reef supports commercial, recreational, Indigenous and charter fishing, targeting a range of species including fish, sharks, crabs and prawns. Some remaining impacts of fishing pose major threats to the future vitality of the Reef.