Caryophyllia smithii, Tubularia indivisa, Calliostoma zizyphinum. Site: E of Black Head, Rathlin Is
 Caryophyllia smithii, Tubularia indivisa, Calliostoma zizyphinum. Event number: 19830610/02. Site: E of Black Head, Rathlin Is. 1983-06-10. Photograph © Christine Howson. (4/11) 
 Christine Howson (2026). Photograph of Caryophyllia smithii, Tubularia indivisa, Calliostoma zizyphinum. Site: E of Black Head, Rathlin Is. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2171.jpg. Accessed on 2026-11-04