Coelacanths have been around for millions of years and they haven't really changed much. This is a photograph of the tail section of a fossil coelacanth on display in the Museum. It was found at a famous site called Solnhofen in Germany and is about 150 million years old.
All coelacanths have lobed fins and a lobed tail. Can you see this in the fossil? Run your mouse over the image to see if you are right.