Movie 2

Dorsal fin position during 1 BL PIV. This movie was recorded at 500 frames s^-1 and played back at 5 frames s^-1. This sequence of images shows the presence of the dorsal fin, along with the caudal fin, in the PIV light sheet (see also t = 0.030 s of Fig. 6). Contrast in the video has been linearly stretched until 2.5% of the original pixels reach saturation to increase body visibility.