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Sponges
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| Phylum: Porifera | |
| (Most sponges are difficult to classify on external appearance and require microscopic examination of the spicules to provide accurate identification). | |
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Close examination of a sponge reveals that its body is covered in a network of tiny holes or pores, which allow water to be taken in, as well as larger opening that allow the water to be pumped out |
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