Polybius depurator, Ascidiella aspersa. Site: W of Black Rock, Strangford Lough
 Polybius depurator, Ascidiella aspersa. Event number: 19830809/07. Site: W of Black Rock, Strangford Lough. 1983-08-09. Photograph © David Erwin. (2/19) 
 David Erwin (2026). Photograph of Polybius depurator, Ascidiella aspersa. Site: W of Black Rock, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2853.jpg. Accessed on 2026-11-04