Which of the following is not the characteristic feature of pisces?

Options

A. Presence of streamlined body
B. Presence of lateral line sense organ
C. Presence of fins
D. Pentadactyl

Answer

**Step-by-Step Solution:**

1. **Understanding the Characteristics of Pisces**:
- Pisces, commonly known as fish, have specific features that help them survive in aquatic environments.

2. **Evaluating the Options**:
- The question asks for a feature that is NOT characteristic of Pisces. We need to analyze each option provided.

3. **Presence of Streamlined Body**:
- A streamlined body shape is a characteristic of Pisces. This shape allows fish to move efficiently through water, reducing resistance.

4. **Presence of Lateral Line Sense Organ**:
- The lateral line system is a unique sensory organ found in fish. It helps them detect changes in water pressure and vibrations, which is essential for navigation and hunting.

5. **Presence of Fins**:
- Fins are crucial for movement in water. They help fish steer, balance, and propel themselves forward. This is also a characteristic feature of Pisces.

6. **Penta-Dactyl Limbs**:
- The term "Penta-Dactyl" refers to having five digits or fingers, which is a characteristic of tetrapods (like reptiles, birds, and mammals). Fish do not have limbs with five digits; instead, they have fins.

7. **Conclusion**:
- Among the options provided, the characteristic that is NOT associated with Pisces is "Penta-Dactyl." Therefore, the correct answer is that Penta-Dactyl is not a feature of Pisces.

**Final Answer**: Penta-Dactyl is not a characteristic feature of Pisces.

---