Fig. 3. Relationship between the angular speed (_A) while corkscrewing necessary to execute various numbers of complete spins (N) over a range of swimming speeds (v_s). The dotted diagonal lines indicate a realistic approximation of the spinning performance of the dolphin, where the angular speed is directly proportional to the swim speed (i.e. _A=_Rv_s). The black dotted line is based on the observation of spinning rate from Lagenorhynchus obliquidens of _R=1.5 rad m^-1. The red dotted line is for _R=3 rad m^-1 in order to achieve seven aerial spins, which is the maximum number of spins observed for Stenella longirostris (Norris et al., 1994).