photo from Sponge V by B. Picton
in situ photo from Scotland, Mario de Kluijver
Bowerbank's (1874) drawing of the habit
Topsent's (1894) drawing of habit and spicules
MCS Sponge V spicule drawing by C. Morrow
SEM photo of sterraster by B. Picton
SEM overview of spicules by B. Picton