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Demosponge facts for kids

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Barrel sponge (Xestospongia testudinaria).jpg
Barrel sponge (Xestospongia testudinaria)
Scientific classification
Kingdom: Animalia
Phylum: Porifera
Class: Demospongiae


The Demospongiae are the largest class in the phylum Porifera. Their skeletons are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges.

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