Pachymatisma johnstonia (Bowerbank, 1842)
Portnagh Rock, St. John. Photograph © Bernard Picton
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| Bernard Picton (2026). Photograph of Pachymatisma johnstonia. (Bowerbank, 1842). [In] Marine Biodiversity Data Portal - NI. https://habitas.org/mbdp/photo.php?item=porifera-438. Accessed on 2026-11-04 |