Callyspongia siphonella

{{Short description|Species of sponge}}

{{Speciesbox

| image = Callyspongia siphonella.JPG

| image_caption = A pink variant of Callyspongia siphonella

| genus = Callyspongia

| parent = Callyspongia (Callyspongia)

| species = siphonella

| authority = Lévi, 1965

| synonyms = * Siphonochalina siphonella Lévi, 1965

}}

Callyspongia siphonella, commonly known as colonial tube-sponge, is a species of sea sponge endemic to the Red Sea. Clusters of its pale lavender to pink long tubes reach up to {{convert|60|cm|in}} in size.{{cite book|title=Coral reef guide. Red Sea|first1=Ewald|last1=Lieske|first2=Robert|last2=Myers|year=2004|page=238|isbn=9780007741731}}[http://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=166199 World Porifera Database - Species - Callyspongia (Callyspongia) siphonella (Lévi, 1965)][http://eol.org/pages/1163738/overview Blasser Röhrenschwamm (Callyspongia siphonella) - Information on Blasser Röhrenschwamm - Encyclopedia of Life] Callyspongia siphonella contains a bioactive compound, Sipholenol A., that has been studied for its anti-proliferative properties in human breast cancer; these properties provide promise in its potential for developing future compounds and thus contributes greatly to future cancer research.{{Cite journal|last1=Foudah|first1=Ahmed I.|last2=Sallam|first2=Asmaa A.|last3=Akl|first3=Mohamed R.|last4=El Sayed|first4=Khalid A.|date=2014-02-12|title=Optimization, pharmacophore modeling and 3D-QSAR studies of sipholanes as breast cancer migration and proliferation inhibitors|url=https://www.sciencedirect.com/science/article/pii/S0223523413007824|journal=European Journal of Medicinal Chemistry|language=en|volume=73|pages=310–324|doi=10.1016/j.ejmech.2013.11.039|pmid=24487236 |issn=0223-5234}}

File:Colonial tube-sponge (Callyspongia siphonella) (10069315045).jpg