Echinus esculentus, Delesseria sanguinea. Site: Whitehead, Belfast Lough
 Echinus esculentus, Delesseria sanguinea. Event number: 19840524/01. Site: Whitehead, Belfast Lough. 1984-05-24. Photograph © Bernard Picton. (1/8) 
 Bernard Picton (2026). Photograph of Echinus esculentus, Delesseria sanguinea. Site: Whitehead, Belfast Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_6078.jpg. Accessed on 2026-11-04