Reported here are the relationships among morphological ( i.e ., body condition) and biochemical ( i.e ., plasma concentrations of triglycerides, cholesterol, free fatty acids, and ketone bodies and ketone body ratios) parameters related to energy storage and use, as well as the variation of such parameters, for 107 free‐ranging nurse sharks Ginglymostoma cirratum sampled off South Florida. Immature G. cirratum exhibited a hig...