The young colony is flat and compact, eventually forming a small mound that enlarges to the size of a football. Zooids cover the entire outer surface, producing slimy mucus with a distinctive, sharp odor. The interior of the colony is a clear, gelatinous mass consisting mostly of water. Individual zooids have red pigment around the mouth and two conspicuous white spots on the lophophore. Only one type of statoblast is formed: buoyant, discoid, approximately 0.04 in (1 mm) in diameter with hooked spines radiating from the periphery.
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