Ammonite is a succesful species of mollusk that lived in the age of the dinosaur. It swam the seas with large predatory creatures live Mosasaurs, Plesiosaurus and Ichthyosaurs. It ate fish, and other small creatures. It lived in all over the world. It had tentacles that can snatch prey from the ocean. Today its living decendents still live on, now it is the Nautilus.