Sertularia argentea, Eucratea loricata, Cellaria fistulosa. Site: Skullmartin Rock, Ballywalter
 Sertularia argentea, Eucratea loricata, Cellaria fistulosa. Event number: 19820917/01. Site: Skullmartin Rock, Ballywalter. 1982-09-17. Photograph © Bernard Picton. (8/13) 
 Bernard Picton (2026). Photograph of Sertularia argentea, Eucratea loricata, Cellaria fistulosa. Site: Skullmartin Rock, Ballywalter. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0980.jpg. Accessed on 2026-11-04