
In 2015, two members of the Blue Beach Fossil Museum in Nova Scotia found a long, curved fossil jaw, bristling with teeth. Sonja Wood, the museum’s owner, and Chris Mansky, the museum’s curator, found the fossil in a creek after Wood had a hunch.
The fossil they found belonged to a fish that had died 350 million years ago, its bony husk spanning nearly a metre on the lake bed. The large fish had lived in waters thick with rival fish, including giants several times its size. It had hooked teeth at the tip of its long jaw that it would use to trap elusive prey and fangs at the back to pierce it and break it down to eat.