Here you can see a few pictures of "Shark Vertebrae":




Shark vertebra
Antwerp Area, Belgium
Miocene/ Pliocene



Shark vertebra
Breda Formation, Mill/ Langenboom, The Netherlands
Miocene/ Pliocene



Shark vertebra
Calvert Bay, Maryland, Usa
Miocene/ Pliocene




Shark vertebra
Antwerp Area
Mixed Neogene
(Carcharocles? Cetorhinus?)
-Very big exemplar