Calliostoma zizyphinum. Site: Ballyhenry Island,  Strangford Lough
 Calliostoma zizyphinum. Event number: 20200227/01. Site: Ballyhenry Island, Strangford Lough. 2020-02-27. Photograph © Bernard Picton. (15/48) 
 Bernard Picton (2026). Photograph of Calliostoma zizyphinum. Site: Ballyhenry Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=_b205040.jpg. Accessed on 2026-11-04