Sargassum hornschuchii

Autoría: Kungl. Svenska vetenskapsakademien - https://www.flickr.com/photos/internetarchivebookimages/14756498566/Source book page: https://archive.org/stream/svenskavetenskap23kung/svenskavetenskap23kung#page/n304/mode/1up, No restrictions, https://commons.wikimedia.org/w/index.php?curid=43213327