The grey wall sponge (Stelletta agulhana) is a species of sea sponge belonging to the family Ancorinidae.Samaai, T. and Gibbons, M.J. 2005. Demospongiae taxonomy and biodiversity of the Benguela region on the west coast of South Africa. Afr. Nat. Hist. 1(1):1-96 It is found around the coast of Southern Africa from the Northern Cape to KwaZulu-Natal. It is an endemic species.
Description The grey wall sponge may grow to 10 cm thick and 40–50 cm in length. It is a massive grey sponge with fine spicules protruding from its surface. It has a stony texture, with small oscula visible on the upper surface.
Habitat This sponge lives on rocky reefs in 2-90m of water.Jones, Georgina. A field guide to the marine animals of the Cape Peninsula. SURG, Cape Town, 2008.
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