Which is a catadromous fish?

Options

A. Hilsa
B. Mystus
C. Anguilla
D. Chana

Answer

To determine which fish is catadromous from the given options, we need to understand the characteristics of catadromous fish.

1. **Definition of Catadromous Fish**: Catadromous fish are species that are born in saltwater, migrate to freshwater to grow and mature, and then return to saltwater to spawn.

2. **Analyzing the Options**:
- **Hylsa**: This fish is primarily found in marine and estuarine environments, not fitting the catadromous definition.
- **Mystis**: This species is a freshwater fish and does not migrate to saltwater, hence it is not catadromous.
- **Anguilla**: This genus includes eels, which are known to be catadromous. They are born in the ocean, migrate to freshwater to grow, and return to the ocean to spawn.
- **Channa**: Known as snakeheads, these are predatory freshwater fish and do not exhibit catadromous behavior.

3. **Conclusion**: Based on the definitions and characteristics of the options provided, the correct answer is **Anguilla**, as it is a catadromous fish.

### Step-by-Step Solution:
1. Define catadromous fish.
2. Analyze each option based on their habitat and migration patterns.
3. Identify that Anguilla fits the definition of catadromous fish.
4. Conclude that Anguilla is the correct answer.