Polycera quadrilineata spawn. . Site: East Down Yacht Club 
 Polycera quadrilineata spawn. Event number: 20230627/01. Site: East Down Yacht Club. 2023-06-27. Photograph © Christine Morrow. (25/25) 
 Christine Morrow (2026). Photograph of Polycera quadrilineata spawn. . Site: East Down Yacht Club. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=_z231398.jpg. Accessed on 2026-11-04