Stereo-DPIV data of flow in the wake of a rainbow trout (21.5 cm long) swimming steadily at 1.2 Ls^-1. This movie shows flow lasting 0.93 seconds (approximately 2.5 tail beats) and is composed of 40 images, each of which contains 1092 vectors, for a total of 43,680 vectors representing the wake flow during this time. A perspective view shows the x, y, and z components of flow. Flow to the left (away from the reader) is in the negative z direction, while flow to the right (toward the reader) occurs in the positive z direction. Mean freestream flow has not been subtracted. Vector bases are anchored at a value of 0 on the z axis. The alternating flow in the z direction reflects jet flow through linked wake vortex rings. Scale bars indicate the w (or z) component of flow in m s^-1; red color indicates flow to the left of the fish (+z), while blue color indicates flow to the right of the fish (-z)

Stereo-DPIV data of flow in the wake of a rainbow trout (21.5 cm long) swimming steadily at 1.2 Ls^-1. This movie shows flow lasting 0.93 seconds (approximately 2.5 tail beats) and is composed of 40 images, each of which contains 1092 vectors, for a total of 43,680 vectors representing the wake flow during this time. This movie shows the same data as in movie 1 from the dorsal perspective to illustrate the alternating jet flow originating from tail vortex rings. Positive x-values are downstream; note that the scales for the x and z components differ considerably and that the z-component is greatly enlarged for clarity. Scale bars indicate the w (or z) component of flow in m s^-1; red color indicates flow to the left of the fish (+z), while blue color indicates flow to the right of the fish (-z)