Polybius depurator, Antedon bifida. Site: N of Dunnyneill Is, Strangford Lough
 Polybius depurator, Antedon bifida. Event number: 19830801/04. Site: N of Dunnyneill Is, Strangford Lough. 1983-08-01. Photograph © David Connor. (3/4) 
 David Connor (2026). Photograph of Polybius depurator, Antedon bifida. Site: N of Dunnyneill Is, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_2620.jpg. Accessed on 2026-11-04