Pennatula and Gorgonia are

Options

A. Hydrozoans
B. Scyphozoans
C. Corals
D. Ctenophores.

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: The question asks about Pennatula and Gorgonia.
- Pennatula is commonly known as "sea pen."
- Gorgonia is commonly referred to as "sea fan."

2. **Classify the Organisms**: We need to determine the phylum to which both Pennatula and Gorgonia belong.
- Both organisms are marine invertebrates.

3. **Review the Options**: The options provided are:
- Hydrozoans
- Cyphozoans
- Corals
- Tenophora

4. **Analyze Each Option**:
- **Hydrozoans**: This class includes small, often colonial organisms, but does not include Pennatula or Gorgonia.
- **Cyphozoans**: This class includes true jellyfish, which are not related to Pennatula or Gorgonia.
- **Corals**: Both Pennatula and Gorgonia are indeed part of the phylum Cnidaria, which includes corals and other similar organisms.
- **Tenophora**: This phylum includes comb jellies, which are different from Cnidarians.

5. **Conclusion**: Since both Pennatula and Gorgonia belong to the phylum Cnidaria and are often categorized under corals, the correct answer is:
- **Corals** (Option 3).

**Final Answer**: Pennatula and Gorgonia are classified under the phylum Cnidaria, commonly referred to as corals.

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