Hippocampus has

Options

A. Head at right angles to body
B. Prehensile tail
C. Only dorsal fin and reduced pectoral fins
D. All the above

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to the hippocampus, which is commonly known as the seahorse.

2. **Analyze the Features**:
- **Head Orientation**: The seahorse has a head that is at a right angle to its body, similar to horses. This unique feature is one of the defining characteristics of the seahorse.
- **Prehensile Tail**: The seahorse possesses a prehensile tail, which means that its tail can grasp or hold onto objects. This adaptation is useful for anchoring themselves to seaweed or coral in their habitat.
- **Fins**: Seahorses swim primarily using their dorsal fin, which is located on their back. Their pectoral fins are significantly reduced in size and are located behind their eyes, which is another unique characteristic of this species.

3. **Conclusion**: Based on the features analyzed:
- The seahorse has a head at a right angle to its body (correct).
- It has a prehensile tail (correct).
- It swims using its dorsal fin and has reduced pectoral fins (correct).

Therefore, all the statements about the seahorse are correct.

4. **Final Answer**: The answer is option D, which states that all the above statements are correct.

---