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Description
The cup sponge Hyalonema sp. The cup sponge is a type of glass sponge with astalk of long glass spicules supporting the goblet head. Glass sponges aresome of the oldest colonial animals (metazoans) on Earth, arising after bacteria and single-celled organisms. (Image credit: Brooke et al., NOAA-OER, HBOI.; Florida Coast Deep Corals Expedition 2005)