Callyspongia crassa, commonly known as prickly tube-sponge, is a species of sponge found from the Red Sea to the Seychelles. Its wide flexible brown tube with exterior protuberances can appear as a single tube or as clusters of tubes and can reach up to 50 centimeters (20 inches) in size.[1][2][3] Like many other sea sponges, it is primarily used for marine drugs as they have many bioactive components and properties.[4] They also play an important role in marine reef and benthic communities, as they constantly filter water and act as habitats for smaller organisms.[5][6] As sea sponges, they have the ability to reproduce both sexually and asexually.[7]
^Lieske, Ewald; Myers, Robert (2004). Coral reef guide. Red Sea. HarperCollins. p. 238. ISBN9780007741731.
^Singh, Anshika; Thakur, Narsinh L. (22 December 2017). "Influence of spatial competitor on asexual reproduction of the marine sponge Cinachyrella cf. cavernosa (Porifera, Demospongiae)". Hydrobiologia. 809: 247–263. doi:10.1007/s10750-017-3470-2. S2CID3320898.