Two histories in one specimen. The tooth gives you the original animal. The bryozoan growth that settled over it gives you a second life that arrived much later, after the tooth had already become part of the sea floor. Bryozoans are tiny colonial filter-feeders that build hard, lacework crusts on whatever surface they can find, and here they found a shark tooth.

That layering is the hook. It turns the object from a single fossil into a small marine sequence: predator, death, burial, and then a slow second colonisation on top. It comes mounted on a clear stand, which is included.