Alcyonium digitatum, Nemertesia antennina, Calliostoma zizyphinum, Cellaria fistulosa, Filograna implexa. Site: Ballyhenry Island, Strangford Lough
 Alcyonium digitatum, Nemertesia antennina, Calliostoma zizyphinum, Cellaria fistulosa, Filograna implexa. Event number: 19820630/05. Site: Ballyhenry Island, Strangford Lough. 1982-06-30. Photograph © Bernard Picton. (9/14) 
 Bernard Picton (2026). Photograph of Alcyonium digitatum, Nemertesia antennina, Calliostoma zizyphinum, Cellaria fistulosa, Filograna implexa. Site: Ballyhenry Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0677.jpg. Accessed on 2026-11-04