Clionaidae
Clionaidae is a family of ectoparasitic demosponges which are found worldwide. This group of sponges are well known for boring holes in calcareous material such as mollusc shells and coral skeletons, using both chemical and mechanical processes.
Genera within this family include:Cervicornia Rützler & Hooper, 2000Cliona Grant, 1826Clionaopsis Rützler, 2002Cliothosa Topsent, 1905Dotona Carter, 1880Pione Gray, 1867Scolopes Sollas, 1888Spheciospongia Marshall, 1892Spiroxya Topsent, 1896Volzia Rosell & Uriz, 1997