Fig. 7. Turn angles predicted by a simple model of body curvature during turning plotted against measured turning angles. The model predicts maximum turn angle to be the product of maximum body curvature (K) and fish fork length (FL), which is dimensionless. Points are coded according to FL (see key) and are the mean values of all turning sequences from each individual. If actual turn angles matched predicted turn angles, there should be a 1:1 relationship between the two variables. All the turn angles measured are substantially smaller than the angles predicted by the model.