Key points are not available for this paper at this time.
Elizabeth L. Brainerd, Sheila N. Patek, Vertebral Column Morphology, C-Start Curvature, and the Evolution of Mechanical Defenses in Tetraodontiform Fishes, Copeia, Vol. 1998, No. 4 (Dec. 30, 1998), pp. 971-984
Brainerd et al. (Wed,) studied this question.