Name a fresh water sponge and a ceolenterate.

Explanation

To answer the question, "Name a fresh water sponge and a coelenterate," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Fresh Water Sponge:**
- Fresh water sponges belong to the phylum Porifera.
- While most sponges are marine, there are some that live in freshwater environments.
- A well-known example of a freshwater sponge is **Spongilla**.
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