Fig. 2. Midline and centre of mass (red circles) of the fish at 40 ms intervals from the onset of the response. Head is indicated by the arrow. A and B correspond to the fast and slow responses, respectively, shown in Fig. 1. C and D show large turns achieved by fast and slow responses, respectively. Note the longer time taken by fish in B and D in order to achieve a similar stage 1 angle as A and C, respectively.