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sessile metazoan animals, they do not move
they are sessile feeders
1. Class Calcarea 2. Class Demospongiae 3. Class Hexactinellida
choanoderm and Pinacoderm
Demodpongiae is the largest class in the phylum Profera.
it is found between the inner canals and chambers of meohyl
Sponges are hermaphrodite with male and female cells
sexually, asexually and regeneration