What is the common name of the members of phylum Porifera ?

Explanation

**Step-by-Step Solution:**

1. **Identify the Phylum**: The question asks about the common name of the members of a specific phylum, which is Porifera.

2. **Common Name**: The common name for the members of phylum Porifera is "sponge."

3. **Characteristics of Sponges**:
- Sponges are primarily found in marine environments.
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