EMBARGOED UNTIL 27th AUGUST 2026.
Title: Status of Coral Reefs of the World: 2025 – Chapter 10 – Western Indian Ocean
Authors: Karin Moejes, Alex H. O’Brien, Lionel Bigot, Sean N. Porter, Eylem Elma, Gilberte Gendron, Léo Barret, Julien Wickel, Joshua Rambahiniarison, Gildas Todinanahary, Erwan Sola, Swaleh Ali Aboud, David Obura.
Contributor Roles: CRedIT statement for this chapter
Date: 27th August 2026
Institution: Global Coral Reef Monitoring Network (GCRMN), International Coral Reef Initiative (ICRI)
DOI: https://doi.org/10.59387/LFPR6347.WIO
Part of: Status of Coral Reefs of the World: 2025
Cite this chapter: Moejes, K., O’Brien, A., Bigot, L., Porter, S., et al. (2026). Chapter 10 – Western Indian Ocean. In González-Rivero, M., et al. Status of Coral Reefs of the World: 2025. Global Coral Reef Monitoring Network (GCRMN), International Coral Reef Initiative (ICRI). https://doi.org/10.59387/LFPR6347.WIO
Copyright Information: Copyright © 2026, Global Coral Reef Monitoring Network (GCRMN) and International Coral Reef Initiative (ICRI).
Supplementary Material: https://doi.org/10.5281/zenodo.21824430
This publication may be reproduced in whole or in part and in any form for educational or non-profit services, provided acknowledgement of the source is made. No use of this publication may be made for resale or any other commercial purpose without prior permission in writing.
With thanks to the co-authors of this chapter:
Karin Moejes, Alex H. O’Brien, Lionel Bigot, Sean N. Porter, Eylem Elma, Gilberte Gendron, Léo Barret, Julien Wickel, Joshua Rambahiniarison, Gildas Todinanahary, Erwan Sola, Swaleh Ali Aboud, David Obura.
Edited by: Manuel Gonzalez-Rivero; Thomas Dallison; Jeremy Wicquart; Amanda Brigdale; Erica K. Towle; Murray Logan; Emily K. Fobert; Francis Staub; Serge Planes.
With thanks to the data contributors:
Rose Abae; Swaleh Aboud; Aly Bachiry Adouhouri; Mmadi Ahamada; Mohamed Ahmed; Moustoifa Ahmed; Amkieltiela Amkieltiela; Antumane Arabe; Lovasoa Cédrique Augustave; Léo Barret; Lionel Bigot; Rodney Bonne; Angelique Brathwaite; Léo Broudic; Bruce Cauvin; Yudmila Chunguane; Norton Amilton Cossa; Inés Costa Alonso; Benjamin Cowburn; Youssouf Dahalani; Juliette Damien; Emily Darling; Ibrahim Ali Daud; Pierre Descamp; Jeimila Donty; Yoan Doucet; Graham J. Edgar; Eylem Elma; Duolah Fanambinantsoa; Raquel Fernandes; Kim Fisher; Anna Flam; Jan Freiwald; Remy Garnier; Gilberte Gendron; Rodney Govinden; Nick Graham; Farah Gutale; Pagu Iswalala; Colin Jackson; Isabelle Jurquet; Juliet F. Karisa; Ulrike Kloiber; Ewout Knoester; Oriane Lepeigneul; Abdisalaam Libaan; Sidonio Machaieie; Mouchtadi Madi Bamdou; Omar Mahadalle; Tom Martin; Anderson B. Mayfield; Adfaoun Mchida; Jean Mensa; Jenny Mihaly; Karin Moejes; Misbahou Mohamed; Casper Morch; Vanessa Muianga; Hassan Yuusuf Muse; Peter Musila; Carolina Mutatisse; Isabel Narques Da Silva; Pascoal Nhamussua; Jean-Benoit Nicet; Omar Nyange; Alex H. O’Brien; David Obura; Lizzi Oh; Abdi Shakur Farah Omar; Mohammed Omar; Ronald Osinga; Marcos Pereira; Pierre Petitjean; Mathieu Pinault; Lena Pollett; Sean Porter; Catherine Priess; Fouad Abdou Rabi; Dayda Rakotomahatsiaro; Solotahiana Rakotomanga; Mahery Randrianarivo; Tahiry Randrianjafimanana; Danny Kornelio Ravelojaona; Rindra Razandriarison; Denmark Recamara; Corinne Russo; Daniel Saad; Ahamada Said; Faissoil Said; Hilal Saidina; Ahmed Sh Ibrahim Sh Aba; Jorge Sitoe; Robert Sluka; Erwan Sola; Rick D. Stuart-Smith; Bernard Thomassin; Gildas Todinanahary; Francesca Trotman; Ali M. Ussi; Effy Vessaz; Rosario A. Viador; Ibrahim Hassan Warsame; Margot Webster; Shaun Wilson; Saleh Yahya; Nilza De Catarina Zandamela; Francisco Zivane.
The GCRMN produces estimations regarding the status and trends of coral reefs using data acquired by the members of the GCRMN network. The data are collected following Data Sharing Agreements (DSA) with data contributors and as such the GCRMN is not the owner of datasets shared by its members. Therefore, for the “Status of Coral Reefs of the World: 2025” report, the GCRMN is unable to share the raw datasets. However, some members of the GCRMN network and report contributors have made their datasets publicly available. For benthic cover monitoring data, such open access datasets are listed here.
All code used to produce the results and figures presented in the “Status of Coral Reefs of the World: 2025” GCRMN report is openly available on a GitHub repository. This repository allows full reproducibility and transparency of the analyses.
