Echinocardium cordatum. Site: Magilligan Strand
 Echinocardium cordatum. Event number: 19820729/02. Site: Magilligan Strand. 1982-07-29. Photograph © Bernard Picton. (5/8) 
 Bernard Picton (2026). Photograph of Echinocardium cordatum. Site: Magilligan Strand. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0402.jpg. Accessed on 2026-11-04