Which of the following does not belong to phylum Coelenterata

Options

A. Sea pen
B. Sea father
C. Sea cucumber
D. Sea fan

Answer

To determine which of the following does not belong to the phylum Coelenterata, we need to analyze the options provided:

1. **Identify the options**: The options given are:
- C. Pen
- C. Feather
- C. Cucumber
- C. Fan

2. **Understand Coelenterata**: Coelenterata, also known as Cnidaria, includes organisms such as jellyfish, corals, and sea anemones. Members of this phylum are characterized by their radial symmetry, a gelatinous body, and the presence of specialized cells called cnidocytes.

3. **Analyze each option**:
- **C. Pen**: This refers to the "sea pen," which is a colonial organism belonging to the class Pennatulacea within the phylum Cnidaria.
- **C. Feather**: This likely refers to the "sea feather," another colonial organism that belongs to the same phylum.
- **C. Cucumber**: This refers to the "sea cucumber," which is not a member of the phylum Coelenterata. Instead, sea cucumbers belong to the phylum Echinodermata, specifically the class Holothuroidea.
- **C. Fan**: This likely refers to the "sea fan," which is a type of coral and is part of the phylum Cnidaria.

4. **Conclusion**: Based on the analysis, the organism that does not belong to the phylum Coelenterata is the **C. Cucumber**.

Final Answer: **C. Cucumber**