Metridium senile. Site: Ridge, N of The Skerries, Portrush
 Metridium senile. Event number: 19850726/02. Site: Ridge, N of The Skerries, Portrush. 1985-07-26. Photograph © Bernard Picton. (3/7) 
 Bernard Picton (2026). Photograph of Metridium senile. Site: Ridge, N of The Skerries, Portrush. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_11773.jpg. Accessed on 2026-11-04