Heterosiphonia plumosa. Site: N of Chapel Island, Strangford Lough
 Heterosiphonia plumosa. Event number: 19820615/04. Site: N of Chapel Island, Strangford Lough. 1982-06-15. Photograph © Bernard Picton. (4/12) 
 Bernard Picton (2026). Photograph of Heterosiphonia plumosa. Site: N of Chapel Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0247.jpg. Accessed on 2026-11-04