Fig. 5. Size, strength and angle of the lateral jets in the wake at different swimming speeds. Boxes are standard statistical box plots, described in detail in Fig. 1. Shades from white to red represent different swimming speeds, and shades of blue and green represent different individuals. (A) Mean jet velocity magnitude against swimming speed. A linear regression line is shown in black and the r² value is indicated above. (B) Mean angle of the jet against swimming speed. (C) Jet diameter against swimming speed. No significant linear relationship exists in B and C and so a regression line is not shown.