Polymastia penicillus, Nemertesia antennina, Alcyonidium diaphanum. Site: NW Portstewart Point
 Polymastia penicillus, Nemertesia antennina, Alcyonidium diaphanum. Event number: 19840705/02. Site: NW Portstewart Point. 1984-07-05. Photograph © Bernard Picton. (2/13) 
 Bernard Picton (2026). Photograph of Polymastia penicillus, Nemertesia antennina, Alcyonidium diaphanum. Site: NW Portstewart Point. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_7462.jpg. Accessed on 2026-11-04