Which of the following animal is considered as "Living fossil" :-

Options

A. Limulus
B. Spider
C. Eupagurus
D. Scorpion

Answer

To determine which animal is considered a "living fossil," we can analyze the options provided:

1. **Understanding the term "living fossil":**
- A "living fossil" refers to a species that has remained relatively unchanged over a long period of geological time and closely resembles species known from the fossil record.

2. **Evaluating the first option: Lamelas (King Crab):**
- King crabs, scientifically known as Lamelas, have existed for about 190 million years without significant evolutionary changes. This long history and lack of change qualify them as living fossils.

3. **Evaluating the second option: Spider:**
- Spiders are part of the arachnids and have undergone various evolutionary changes. They do not fit the criteria of a living fossil.

4. **Evaluating the third option: Eupagurus (Hermit Crab):**
- Hermit crabs, or Eupagurus, are also not considered living fossils as they have evolved and adapted over time.

5. **Evaluating the fourth option: Scorpion:**
- While scorpions are ancient creatures, they have also evolved and do not meet the criteria of a living fossil.

6. **Conclusion:**
- Based on the evaluation of the options, the correct answer is **Lamelas (King Crab)**, as it is considered a living fossil due to its long history and minimal evolutionary changes.