Which is unique in fishes ?

Options

A. Gills
B. Tails
C. Lateral line sensory organs
D. Lungs

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a feature that is unique to fishes. We need to analyze the given options to determine which one is exclusive to fishes.

2. **Analyzing the Options**:
- **Gills**: Gills are respiratory organs found in many aquatic animals, including amphibians. Therefore, gills are not unique to fishes.
- **Tails**: While fishes have tail fins, the term "tail" can be misleading as it is not specific to fishes alone. Other animals also have tails, so this option is not unique.
- **Lateral Lines**: This is a sensory system found in fishes that allows them to detect movement and vibrations in the water. It is a unique feature of fishes.
- **Sensory Organs**: While fishes have sensory organs, this term is broad and not specific to fishes alone.
- **Lungs**: Lungs are primarily found in terrestrial animals. Some fish, like lungfish, have lungs, but this is not a characteristic of all fishes.

3. **Identifying the Unique Feature**: From the analysis, the lateral line system stands out as a feature that is unique to fishes. It is specifically adapted for their aquatic environment.

4. **Conclusion**: The unique feature in fishes is the **lateral line sensory organs**.

**Final Answer**: The unique feature in fishes is the **lateral line sensory organs**.

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