Why is Latimeria called a living fossil?

Explanation

### Step-by-Step Solution:

1. **Definition of Living Fossils**: Living fossils are organisms that have remained relatively unchanged over long periods of geological time. They exhibit characteristics that are very similar to their ancient ancestors.

2. **Introduction to Latimeria**: Latimeria, also known as coelacanth, is a type of fish that is often referred to as a living fossil.

3. **Evolutionary Background**: Latimeria evolved around 70 million years ago. This means that it has existed in a form that is very similar to its ancestors for millions of years.

...