Eyes of the Reef

Interesting video on corals

Video of bleaching off Kahe Point, Oahu

Thanks to Dr. Bruce Carlson for submitting this video!!

How do I report coral bleaching?

The Eyes of the Reef Reporting form might look a little intimidating at first, but it’s not really that bad, trust us! Your observations are very valuable to resource managers, so please take a moment to go though these images that were designed to help you understand what the form is asking. You can make a report any time you get in the water, whether you see bleaching or not – that is considered data too and managers want to hear about it! Thank you for your citizen science stewardship efforts! Read More


The Department of Land and Natural Resources (DLNR) and the National Ocean and Atmospheric Administration (NOAA) have issued alerts regarding the record ocean temperatures in our state waters and the subsequent coral bleaching that is being observed. Unfortunately, these conditions are expected to last into November or December.  With your reports and monitoring by scientists and Division of Aquatic Resources (DAR),  DAR and NOAA aquatic biologists are able to record the extent of the bleaching and subsequent recovery or mortality.   For more information on the current bleaching alerts in Hawai‘i, visit NOAA coral bleaching website.

Thank you for reporting the coral bleaching occurring in your area. State aquatic biologists and scientists are monitoring reef conditions and compiling data. YOUR REPORT Is INVALUABLE and is providing much needed information. Please keep submitting reports as you see bleaching in new areas.  To make a report, use the form links on the top of the EOR website.

Why are Hawaii’s corals bleaching? 2015 FAQ

What is coral bleaching?

Coral bleaching is the loss of color from coral tissue allowing the white skeleton to show through.

Coral’s have an important relationship (symbiosis) with single-celled algae (zooxanthellae), which live in their tissues. The zooxanthella provides food for the coral and in return the coral provides a stable home for the algae. Most of the coral’s nutrition comes from the algae. Coral bleaching is the loss of color from the colony when the algae are expelled from the coral polyps and then the white coral skeleton is visible through the transparent coral tissue.

Partially bleached brown lobe coral (Porites evermanni)

Partially bleached brown lobe coral (Porites evermanni)

Close up of bleached coral polyps on brown lobe coral surrounded by healthy tissue

Close up of bleached coral polyps on brown lobe coral surrounded by healthy tissue

Why are our corals bleaching this year? Read More