Halopteris catharina, Antedon bifida, Ophiothrix fragilis, Corella parallelogramma. Site: Marlfield Bay, Strangford Lough
 Halopteris catharina, Antedon bifida, Ophiothrix fragilis, Corella parallelogramma. Event number: 19820513/01. Site: Marlfield Bay, Strangford Lough. 1982-05-13. Photograph © Christine Howson. (7/29) 
 Christine Howson (2026). Photograph of Halopteris catharina, Antedon bifida, Ophiothrix fragilis, Corella parallelogramma. Site: Marlfield Bay, Strangford Lough. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_0050.jpg. Accessed on 2026-11-04