image: Halopteris catharina. Studio shot showing arrangement of the hydrothecae.

Halopteris catharina (Johnston, 1833)
Studio shot showing arrangement of the hydrothecae. Photograph © Bernard Picton

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 Bernard Picton (2026). Photograph of Halopteris catharina. (Johnston, 1833). [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/photo.php?item=_b147187. Accessed on 2026-11-04