* Neural Spine Varies: The size of the neural spine (the bony projection on top of a vertebra) varies significantly between different whale species, even within the same species. It also changes depending on the location of the vertebra along the spine.
* Function: The neural spine's size is related to its function. It provides attachment points for muscles that support the back, neck, and tail, and it plays a role in the whale's ability to move and swim.
* Evolutionary Adaptations: The neural spines of whales have evolved to suit their specific needs. For instance, whales with powerful tails for swimming might have larger neural spines in the caudal (tail) region.
To get a better understanding of a whale's neural spine, you'd need to specify the species and the region of the spine you're interested in.