Halichoerus grypus. Site: Ballyhenry Island,  Strangford Lough
 Halichoerus grypus. Event number: 20200918/01. Site: Ballyhenry Island, Strangford Lough. 2020-09-18. Photograph © Christine Morrow. (65/125) 
 Christine Morrow (2026). Photograph of Halichoerus grypus. Site: Ballyhenry Island, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=p9180370.jpg. Accessed on 2026-11-04