Antedon bifida, Ophiocomina nigra. Site: Marlfield Bay, Strangford Lough
 Antedon bifida, Ophiocomina nigra. Event number: 19820513/01. Site: Marlfield Bay, Strangford Lough. 1982-05-13. Photograph © Christine Howson. (5/29) 
 Christine Howson (2026). Photograph of Antedon bifida, Ophiocomina nigra. Site: Marlfield Bay, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0048.jpg. Accessed on 2026-11-04