This is a real fossilized whale segment! Dating back to the Miocene/Pliocene Epochs (5 to 15 million years ago), this ~7.5" long specimen was found in the Hawthorne Formation in South Carolina.
This is the part of the skull with the foramen magnum - where the spine connects to the head.
Though the US prohibits the sale of marine mammal parts, these fossils predate the restrictions and are completely legal! Worldwide shipping is available!