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| Halopteris catharina. Event number: 19820520/03. Site: NW Limestone Rock, Strangford Lough. 1982-05-20. Photograph © David Connor. (20/20) |
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| David Connor (2026). Photograph of Halopteris catharina. Site: NW Limestone Rock, Strangford Lough. [In] Marine Biodiversity Data Portal - NI. https://habitas.org/mbdp/sitephoto.php?item=niss_0160.jpg. Accessed on 2026-11-04 |