Animals that can tolerate a narrow range of salinity are

Options

A. stenohaline
B. euryhaline
C. anadromous
D. catadromous

Answer

**Step-by-Step Solution:**

1. **Understanding Salinity Tolerance**: The question asks about animals that can tolerate a narrow range of salinity. Salinity refers to the concentration of salts in water, which can vary widely in different aquatic environments.

2. **Types of Organisms Based on Salinity Tolerance**: There are two main categories of organisms based on their salinity tolerance:
- **Stenohaline**: These organisms can tolerate only a narrow range of salinity. They are sensitive to changes in salinity and typically inhabit environments with stable salinity levels.
- **Euryhaline**: These organisms can tolerate a wide range of salinity. They are adaptable to varying salinity levels and can survive in both freshwater and saltwater.

3. **Identifying the Correct Term**: Since the question specifically asks for animals that can tolerate a narrow range of salinity, the correct term to use is **Stenohaline**.

4. **Additional Terms for Context**: The transcript also mentions two other terms:
- **Anadromous**: Refers to fish that live in seawater but migrate to freshwater to spawn.
- **Catadromous**: Refers to fish that live in freshwater but migrate to seawater to spawn.

5. **Conclusion**: Based on the definitions and the context provided, the answer to the question is that animals that can tolerate a narrow range of salinity are called **Stenohaline**.

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