List three peculiar characters of coelenterata.

Explanation

### Step-by-Step Solution

1. **Definition of Coelenterata (Cnidaria)**:
- Coelenterata, also known as Cnidaria, is a phylum of animals that includes jellyfish, corals, and sea anemones. The name "Cnidaria" is derived from specialized cells called cnidoblasts or cnidocytes, which contain stinging structures known as nematocysts.

2. **Presence of Nematocysts**:
- One of the peculiar characters of Coelenterata is the presence of nematocysts. These are stinging capsules found in the tentacles of these organisms. They serve multiple functions, including anchorage, defense against predators, and capturing prey.

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