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| Thyonidium drummondii. Event number: 19800618/03. Site: N of Long Sheelagh, Strangford Lough. 1980-06-18. Photograph © Ulster Museum. (21/24) |
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| Ulster Museum (2026). Photograph of Thyonidium drummondii. Site: N of Long Sheelagh, Strangford Lough. [In] Marine Biodiversity Data Portal - NI. https://habitas.org/mbdp/sitephoto.php?item=niss_1378.jpg. Accessed on 2026-11-04 |