Cystoclonium purpureum is a species of red algae that is abundant on rocks and stones in the intertidal and shallow subtidal. It can be found around the coasts of the Atlantic ocean.
M.D. Guiry. Cystoclonium purpureum. in Guiry, M.D. & Guiry, G.M. 2016. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 29 June 2016.