1" Cretaceous Sea Urchin (Holaster) Fossil - England
This is an inflated and detailed fossil sea urchin of the species Catopygus columbarius that was collected from Great Britain. It is Cretaceous - Cenomanian in age, or approximately 94 to 100 million years old.
Sea urchins are a type of echinoderm which are still living relatively unchanged today. They live at the bottom of soft ocean floors and have long spines protruding from their central body. They move along the bottom of the ocean using many small feet while feeding on various plant and animal matter.