AUTHOR=Favali Paolo , Dañobeitia Juan José , Howe Bruce M. , Ruhl Henry A. TITLE=Editorial: The discovery of the unknown planet: the ocean JOURNAL=Frontiers in Marine Science VOLUME=10 YEAR=2023 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2023.1221674 DOI=10.3389/fmars.2023.1221674 ISSN=2296-7745