Sponge Guide
Demospongiae > Clionaida > Clionaidae > Cliona varians
Spicules image: a) Tylostyles (with spiraster at the same scale); b) ends of tylostyles; c) spirasters (anthosigmas). Sample from the Bahamas. Photos and image composite by Angela Marulanda (U. Javeriana, Cali, Colombia).