A fresh water fish is

Options

A. Chanos
B. Hilsa
C. Clarias
D. Rostelliger

Answer

To determine which of the given options is a freshwater fish, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification of Fish**:
- Fish are classified into different categories based on their habitat. The two main categories are freshwater fish and marine (saltwater) fish.

2. **Review the Options**:
- The options provided are:
- Channos
- Hylsa
- Clarias
- Rosteliger

3. **Identify Each Fish's Habitat**:
- **Channos**: This is a type of milkfish, which is primarily found in marine environments. Therefore, it is not a freshwater fish.
- **Hylsa**: This fish is known to be commonly found in seas and oceans, making it a marine fish as well.
- **Clarias**: Commonly known as catfish, Clarias is typically found in stagnant freshwater bodies. This indicates that it is a freshwater fish.
- **Rosteliger**: This fish is also found in marine conditions, which disqualifies it as a freshwater fish.

4. **Select the Correct Answer**:
- Based on the habitat analysis, the only fish that is classified as a freshwater fish is **Clarias**.

### Final Answer:
The correct answer is **Clarias** (option 3).

---