Ten marine flatworm species compared through real photographs of body shapes and colour patterns. An editorial selection, not a danger ranking. Attribution: 1. File:Pseudoceros dimidiatus.jpg; Richard Ling; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0; https://commons.wikimedia.org/wiki/File:Pseudoceros_dimidiatus.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 2. File:Pseudoceros liparus - Blue Pseudoceros Flatworm.jpg; Stephen Childs; CC BY 2.0; https://creativecommons.org/licenses/by/2.0; https://commons.wikimedia.org/wiki/File:Pseudoceros_liparus_-_Blue_Pseudoceros_Flatworm.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 3. File:Pseudocerotidae - Pseudoceros ferrugineus.jpg; Hectonichus; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Pseudocerotidae_-_Pseudoceros_ferrugineus.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 4. File:Pseudobiceros bedfordi.jpg; Richard Ling; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0; https://commons.wikimedia.org/wiki/File:Pseudobiceros_bedfordi.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 5. File:Pseudobiceros hancockanus.jpg; Jens Petersen; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File:Pseudobiceros_hancockanus.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 6. File:Gusano plano (Pseudobiceros gloriosus), Zanzíbar, Tanzania, 2024-06-01, DD 136.jpg; Diego Delso; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Gusano_plano_(Pseudobiceros_gloriosus),_Zanz%C3%ADbar,_Tanzania,_2024-06-01,_DD_136.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 7. File:Yellow papillae flatworm (Thysanozoon nigropapillosum) (cropped).jpg; Betty Wills; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File:Yellow_papillae_flatworm_(Thysanozoon_nigropapillosum)_(cropped).jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 8. File:Pseudocerotidae - Pseudoceros lindae.jpg; Hectonichus; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Pseudocerotidae_-_Pseudoceros_lindae.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 9. File:Prostheceraeus giesbrechtii Schmarda, 1859.jpg; Parent Géry; CC BY-SA 3.0; https://creativecommons.org/licenses/by-sa/3.0; https://commons.wikimedia.org/wiki/File:Prostheceraeus_giesbrechtii_Schmarda,_1859.jpg; Scaled without cropping; fitted into 9:16 with title and caption bars. 10. File:Prostheceraeus vittatus (Montagu, 1815).jpg; Parent Géry; Public domain; ; https://commons.wikimedia.org/wiki/File:Prostheceraeus_vittatus_(Montagu,_1815).jpg; Scaled without cropping; fitted into 9:16 with title and caption bars.