Encrusting to massive/lobate sponge with a smooth surface and oscula raised on chimneys
Look alikes:
Ectyoplasia ferox
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith