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Article History

Received: 11 January 2022

Revised: 23 March 2022

Accepted: 25 March 2022

First Online: 19 July 2022

Declarations

:

: The authors declare that they have no conflict of interest.

: All applicable international, national, and/or institutional guidelines for animal testing, animal care and use of animals were followed by the authors.

: All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities and are mentioned in the acknowledgements, if applicable. The study is compliant with CBD and Nagoya protocols.

: The dataset “hydroids in the mesophotic coral ecosystems of Reunion Island” can be found through the TAXONOMIC REPOSITORY TAXREF (Natural History National Museum, Paris) in partnership with the “Inventaire National du Patrimoine Naturel” ().

: HR and EB conceived the study. PP and CL organized the scientific tek dives and collected data and biological samples. NGB, EB, HR, LH, CB, DO and TM processed the collected material. NGB performed the taxonomic identification of hydrozoans. NGB, EB and HR wrote the manuscript. All authors constructively reviewed and accepted the final version of the manuscript.