Answer:
Hexactinellida, the Demospongia, and the Calcarea.
Step-by-step explanation:
mr cleann
The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges).
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