A close-up view of the dentition of an ancient aquatic, carnivorous lizard, the mighty Mosasaur, from Late Cretaceous exposures on Vancouver Island. 
<>This well-prepped specimen is now housed in the collections of the Courtenay Museum, Vancouver Island, British Columbia. 

The creature who owned this jaw bone undoubtedly swan alongside Kourisodon puntledgensis, another enormously powerful marine predator and new species of Mosasaur unearthed on Vancouver Island. 

Their feet modified into flippers, they were expert swimmers and hunters, with a strong tail for propulsion. These two would have commanded our ancient seaways between 70 and 66 million years ago.