Grantia compressa. Site: Ballyhenry Island,  Strangford Lough
 Grantia compressa. Event number: 20201119/01. Site: Ballyhenry Island, Strangford Lough. 2020-11-19. Photograph © Bernard Picton. (28/117) 
 Bernard Picton (2026). Photograph of Grantia compressa. Site: Ballyhenry Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=_b190037.jpg. Accessed on 2026-11-04