These are real fossilized Raven Shark (Squalicorax pristodontus) teeth from Morocco! Also referred to as a crow shark, these are an extinct member of the mackerel shark family.
They were a coastal predator, feeding on prey including mosasaur, turtles and even scavenging dead dinosaurs that washed out to sea.
These fossils date back to the Upper Cretaceous (~70 million years old) and were collected near Khourigba, Morocco.
They measure ~1" wide and are available worldwide! Price is per tooth.