Which of the following fins are paired in fishes :-

Options

A. Dorsal fin
B. Anal fin
C. Pelvic fin
D. Ventral fin

Answer

To determine which fins are paired in fishes, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Identify the fins mentioned**: The options given include dorsal fin, anal fin, pelvic fin, and ventral fin.

2. **Analyze the Dorsal Fin**:
- The dorsal fin is a single fin located on the back of the fish.
- Its primary function is to stabilize the fish against rolling.
- **Conclusion**: The dorsal fin is not paired.

3. **Analyze the Anal Fin**:
- The anal fin is located on the ventral surface of the fish, behind the anus.
- It helps in stabilizing the fish while swimming.
- **Conclusion**: The anal fin is also not paired.

4. **Analyze the Pelvic Fin**:
- The pelvic fins are located on the ventral side of the fish, typically in pairs.
- They play a crucial role in balance and maneuverability.
- **Conclusion**: The pelvic fins are indeed paired.

5. **Analyze the Ventral Fin**:
- The term "ventral fin" is often used interchangeably with pelvic fins, but it can also refer to other fins located on the belly of the fish.
- However, in the context of this question, it does not specifically denote a paired structure.
- **Conclusion**: The ventral fin is not specifically recognized as a paired fin.

### Final Answer:
The only paired fins among the options provided are the **pelvic fins**.