Indian Ocean coral bleaching

The alert level of coral bleaching in the WIO  in 2017 remains high with temperatures across the region starting relatively high at the beginning of 2017 (as of Jan 2nd 2017). However, given the high survival rate reported in 2016, acclimation in surviving corals may influence bleaching in 2017 hopefully reducing the degree of bleaching and/or mortality from bleaching. A summary of the recent event will be posted here, and updates relevant to the northern Indian Ocean shortly.cur_b05kmnn_ssta_large


Please continue to report on bleaching and eventual mortality to update the map below, to enable a full reporting of bleaching impact this year.

View detailed maps for 2016 observations of coral bleaching and associated mortality

For materials and guidance on responding to coral bleaching and mortality, visit this page.

Bleaching alerts from 2009 to date are available farther down the page, and more information is available at these links – background and methods.

Indian Ocean coral bleaching observations 2017

The map is updated using observations made via the bleaching report form (right), or at this link – Data displayed here is updated periodically to the global bleaching database maintained by the NOAA Coral Reef Watch programme.

Report coral bleaching” – submit basic observations on coral bleaching through this embedded window, or go to the google-form at this link. All data will be submitted to the global bleaching form supported by the NOAA Coral Reef Watch programme, and made accessible on a WIO regional database under development.



Alerts are published approximately every two weeks between January and May in each year. Select a year, or use the navigation arrows to move left or right to view individual alerts.