Tonicella marmorea, Ophiocomina nigra. Site: S of Kilkeel
 Tonicella marmorea, Ophiocomina nigra. Event number: 19850618/03. Site: S of Kilkeel. 1985-06-18. Photograph © Christine Howson. (8/12) 
 Christine Howson (2026). Photograph of Tonicella marmorea, Ophiocomina nigra. Site: S of Kilkeel. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_9853.jpg. Accessed on 2026-11-04