Which of the following is a feature of Myxine?
(a) Paired fins
(b) Unpaired fins
(c) Anadromous migration
(d) Presence of lower jaw

Options

A. Paired fins
B. Unpaired fins
C. Anadromous migration
D. Presence of lower jaw

Answer

To determine the correct feature of Myxine (also known as hagfish), let's analyze each option provided in the question step by step.

1. **Understanding Myxine**: Myxine is commonly known as hagfish and belongs to the class Agnatha, which means they are jawless fish. This is an important characteristic that will help us eliminate some options.

2. **Evaluating Option (a) Paired fins**:
- Paired fins are characteristic of many fish species, but hagfish do not possess paired fins. Instead, they have a different fin structure.
- **Conclusion**: This option is incorrect.

3. **Evaluating Option (b) Unpaired fins**:
- Hagfish do not have paired fins; instead, they possess unpaired fins. This is a distinctive feature of Myxine.
- **Conclusion**: This option is correct.

4. **Evaluating Option (c) Anadromous migration**:
- Anadromous migration refers to species that migrate from saltwater to freshwater to spawn. Hagfish do not exhibit this behavior; they are primarily found in marine environments and do not migrate in this way.
- **Conclusion**: This option is incorrect.

5. **Evaluating Option (d) Presence of lower jaw**:
- As mentioned earlier, Myxine is a jawless fish, which means it does not have a lower jaw.
- **Conclusion**: This option is incorrect.

Based on the evaluations above, the only correct feature of Myxine is:

**Final Answer**: (b) Unpaired fins.