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Fig. 9. The picture shows the water movements produced by an 8 cm SL Fundulus
heteroclitus taken with a digital video camera at 1000x1000 pixel
resolution. Each velocity vector represents the average of a 32 pixelx32
pixel window, and the center of each window is spaced 16 pixels apart.
Velocities are presented by pseudo color images. Scale bar, 2 cm.