Ammonite

This is probably the most common ammonite from the Inferior Oolite, but also one of the best-preserved, especially if cleaned or prepared well. 

Ammonites are one of the most frequently 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.