Fin rot of fish is caused by

Options

A. Aeromonas
B. Pseudomonas
C. Branchiomyces
D. Xenopsylla

Answer

**Step-by-Step Solution:**

1. **Identify the Disease**: The question asks about the cause of fin rot in fish, which is a common disease affecting the fins of fish.

2. **Understand the Nature of the Disease**: Fin rot is typically caused by bacterial infections that lead to the deterioration of the fin tissue.

3. **Analyze the Options**: The options given are:
- Aeromonas
- Pseudomonas
- Bronchomyces
- Xenopsila

4. **Determine the Correct Bacteria**: Among the options, it is known that fin rot is primarily caused by bacteria. The most relevant bacteria associated with fin rot is **Pseudomonas fluorescens**.

5. **Conclude the Answer**: Based on the information and analysis, the correct answer to the question "Fin rot of fish is caused by" is **Pseudomonas**.

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