This specimen has a crushed body chamber, which is not unusual in ammonites preserved in the softer local rocks. Ammonites are one of the most commonly-found fossils. They are extinct marine creatures – predators that moved through the water by jet-propulsion. We know this because the nautilus, the closest living relative to the ammonite, still survives today in the Pacific and Indian Oceans.
Find out more about ammonites on the molluscs pages.