Which of the following fishes is a living fossil ?

Options

A. Scoliodon
B. Labeo
C. Latimeria
D. Exocoetus

Answer

To determine which of the following fishes is a living fossil, we need to analyze the options provided: Scolodon, Labio, Latimeria, and Exocetus.

### Step-by-Step Solution:

1. **Understand the term "living fossil":**
- A living fossil refers to a species that has remained relatively unchanged over millions of years and closely resembles species known from the fossil record.

2. **Evaluate each option:**
- **Scolodon:** This is a genus of sharks. Sharks have been around for a long time, but Scolodon itself is not classified as a living fossil.
- **Labio:** This refers to a type of bony fish. While bony fishes have a long evolutionary history, Labio is not specifically recognized as a living fossil.
- **Latimeria:** This is a genus that includes the coelacanth, a fish that was thought to be extinct until it was discovered alive in 1938. It is closely related to lungfish and has many primitive features, making it a classic example of a living fossil.
- **Exocetus:** This is a genus of flying fish. While they have unique adaptations, they are not considered living fossils.

3. **Identify the correct answer:**
- Based on the analysis, **Latimeria** is the only fish among the options that is recognized as a living fossil.

### Conclusion:
The correct answer is **Latimeria**.

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