Fig. 6. Velocity vector (B) and vorticity contour (C) fields around the posterior edge of the carapace of the smooth trunkfish model positioned at pitching angles of attack of (left to right): +20°, +10°, 0°, -10° and -20°. The data are viewed in transverse planes, and sampling locations are indicated (A). Each plot is the mean result of 30 velocity fields (1 representative trial). The shadows underneath or to the side of models represent areas that were shielded from laser light. Mean circulation magnitude and mean peak vorticity magnitude values for a dorsal vortex (_D and P_D, respectively) and a ventral vortex (_V and P_V, respectively) are included beneath the vorticity contour plots.

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