Delesseria sanguinea. Site: E of Castle Head, Rathlin Island
 Delesseria sanguinea. Event number: 19850625/03. Site: E of Castle Head, Rathlin Island. 1985-06-25. Photograph © Ulster Museum. (4/9) 
 Ulster Museum (2026). Photograph of Delesseria sanguinea. Site: E of Castle Head, Rathlin Island. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_10018.jpg. Accessed on 2026-11-04