Pacific Data Hub
This dataset shows the global distribution of coral reefs in tropical and subtropical regions. It is the most comprehensive global dataset of warm-water coral reefs to date, acting as a foundation baseline map for future, more detailed, work. This dataset was compiled from a number of sources by UNEP World Conservation Monitoring Centre (UNEP-WCMC) and the WorldFish Centre, in collaboration with WRI (World Resources Institute) and TNC (The Nature Conservancy).
Department of Environment, Tonga
Marine pollution in the Pacific. Regional data
Cook Islands National Environment Service
This dataset has information on coral reef cover and fish in Cook Islands from 1994 to 2013.