(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 7. Flow fields close to the body of a swimming eel, shown in gray. The lateral
position of the eel's snout (off the view) is shown as a black arrow.
Velocities are phase averaged across 14 tail beats by interpolating the normal
gridded coordinate system on to a system defined by the distance from the
eel's body and the distance along the body from the head. Approximate
positions of the proto-vortices, defined by Müller et al.
(2001), are shown in red
(clockwise rotation) and blue (counter-clockwise rotation).