In the zoological name of fish Catla catla, the specific name is identical with the generic name, thus it is an example of

Options

A. antonym
B. tautonym
C. synonym
D. homonym

Answer

To solve the question regarding the zoological name of the fish Catla catla, we need to identify the classification terminology used when the specific name is identical to the generic name. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Zoological Nomenclature**:
- In biological classification, every organism is given a scientific name that consists of two parts: the genus name (generic name) and the species name (specific name).
- For example, in the name Catla catla, "Catla" is the genus name and "catla" is the species name.

2. **Identifying the Names**:
- In the case of Catla catla, both the genus and species names are the same.

3. **Defining Tautonym**:
- A tautonym is a type of scientific name where the genus and species names are identical.
- Examples of tautonyms include Rattus rattus (the common rat) and Gorilla gorilla (the western gorilla).

4. **Modern Nomenclature**:
- It is important to note that while tautonyms were historically used, they are now largely prohibited in modern zoological nomenclature.

5. **Conclusion**:
- Since Catla catla is an example where the specific name is identical to the generic name, it is classified as a tautonym.

### Final Answer:
Thus, the correct answer to the question is that Catla catla is an example of a **tautonym**.

---