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[Free Registration/Login may be required to access all resource tools.] Sponges are classified in the phylum Porifera, from the Latin words meaning "having pores." Sponges are sessile, meaning they cannot move, so they filter water through these pores to obtain their food. Learn more about sponges in this learning module produced by CK-12.
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- Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)