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 The Northern Cape is the largest and most sparsely populated province of South Africa. It was created in 1994 when the Cape Province was split up. Its capital is Kimberley. It includes the Kalahari Gemsbok National Park, part of the Kgalagadi T ...

KwaZulu-Natal KwaZulu-Natal (, also referred to as KZN and known as "the garden province") is a province of South Africa that was created in 1994 when the Zulu bantustan of KwaZulu ("Place of the Zulu" in Zulu) and Natal Province were merged. It is locate ...

. 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.

References

Tetractinellida Animals described in 1907 {{demosponge-stub