Harmothoe extenuata. Site: Ballyhenry Island,  Strangford Lough
 Harmothoe extenuata. Event number: 20210117/01. Site: Ballyhenry Island, Strangford Lough. 2021-01-17. Photograph © Christine Morrow. (7/60) 
 Christine Morrow (2026). Photograph of Harmothoe extenuata. Site: Ballyhenry Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=p1170386.jpg. Accessed on 2026-11-03