This is a real Spinosaurus tail bone (vertebrae)!
These theropod dinosaurs were an apex predator, living in what is now North Africa about 112-97 million years ago.
Measuring ~4" long, this bone can be shipped worldwide!
Spinosaurus could be the largest of all carnivorous dinosaurs, even bigger than Tyrannosaurus! Their diet included fish, and it is believed that they were semi-aquatic like a modern crocodilian! Spinosaurus had a large fin down its back, which is how it earned the name.