Figure 1
From: An inertial mechanism behind dynamic station holding by fish swinging in a vortex street
Fish exhibit two distinct swimming gaits: (a) regular swimming outside the wake in the uniform flow field and (b) swinging between vortices. Sequential positions of the fish centreline advected downstream with the mean flow velocity are imposed on the ink visualisation of the reverse Kármán street, obtained in separate experimental series. Profiles of the mean streamwise flow velocity are shown below the images. In the top left corner, the contour of the fish body is shown with the part of the centreline associated with muscle marked blue.
