Grey wall sponge
species of sponge

The grey wall sponge (Stelletta agulhana) is a species of sea sponge belonging to the family Ancorinidae. 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.
The public source identifies “Grey wall sponge” as species of sponge. This brief keeps that definition visible, then builds a research path around Grey, wall and sponge.
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This entry incorporates text from “Grey wall sponge” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.