AMMONITE - preserved fossil of an extinct cephalopod

This is a beautifully preserved fossil of an extinct cephalopod—similar to today's squid. It is sixty-five million years old and looks fantastic. Cheers to the ammonite! 

Experience the wonder of ancient sea creatures with this Ammonite, a preserved fossil of an extinct cephalopod. Ammonoids, related to modern octopuses and squids, appeared during the Devonian and vanished during the Cretaceous-Paleogene extinction event. Use it as an index fossil to link rock layers to specific periods.