The given below are the names of phyla and names of three animals in front of each phylum. Underline the two animals which belong to the phylum.
Coelenterate: Hydra, sea urchin, sea anemone

Explanation

To solve the question, we need to identify which animals belong to the phylum Coelenterate (now commonly referred to as Cnidaria). The animals listed are Hydra, sea urchin, and sea anemone.

### Step-by-Step Solution:

1. **Identify the Phylum**: The question refers to the phylum Coelenterate, which is known for its members having specialized cells called cnidocytes (or nidoblasts) that contain stinging structures.

2. **List the Animals**: The animals given are:
- Hydra
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