Sea Fur is

Options

A. Hydra
B. Obelia
C. Adamsia
D. Gorgonia.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the common name associated with "Sea Fur."

2. **Identifying the Options**: The options provided are Hydra, Obelia, Adamsia, and Gorgonia.

3. **Analyzing Each Option**:
- **Hydra**: This organism does not have a common name associated with "Sea Fur."
- **Obelia**: This organism is known as "Sea Fur." It belongs to the phylum Cnidaria and has both polyp and medusa life stages.
- **Adamsia**: This organism is commonly known as "Sea Anemone," which does not relate to "Sea Fur."
- **Gorgonia**: This organism is commonly referred to as "Sea Fan," which is also not related to "Sea Fur."

4. **Conclusion**: Based on the analysis, the correct answer is Obelia, as it is the organism commonly referred to as "Sea Fur."

5. **Final Answer**: Obelia is the common name for Sea Fur.

---