Haliclona urceolus. Site: Russells Rock, Maidens
 Haliclona urceolus. Event number: 19850730/01. Site: Russells Rock, Maidens. 1985-07-30. Photograph © Ulster Museum. (13/19) 
 Ulster Museum (2026). Photograph of Haliclona urceolus. Site: Russells Rock, Maidens. [In] Marine Biodiversity Data Portal - NI.
https://habitas.org/mbdp/sitephoto.php?item=niss_11824.jpg. Accessed on 2026-11-04