Cliona celata. Site: Bird Island Passage, Strangford Lough
 Cliona celata. Event number: 19830804/02. Site: Bird Island Passage, Strangford Lough. 1983-08-04. Photograph © David Erwin. (12/13) 
 David Erwin (2026). Photograph of Cliona celata. Site: Bird Island Passage, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2729.jpg. Accessed on 2026-11-04