Self-proclaimed "fossil geek" Peter Bennicke was recently searching a beach at the Cliffs of Stevns in eastern Denmark when he came across a strange fossil in a large piece of chalk. He took the fragment to a museum,

A cluster of 66-million-year-old fish vomit is a natural, national treasure in Denmark. The rare find shines a light on the sea animals of the Cretaceous period.

In the Cretaceous period, a shark or another kind of fish found sea lilies less than digestible. What you might expect followed.