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Structure of the wake depends primarily on Re0, St0 and only secondarily on body shape or swimming mode. Panels show horizontal planes through the computational domain for all four combinations of body shape and swimming mode. Magnitude of vorticity is shown with shades of gray. Left column, Re0 = 4000, St0 = 0.6; right column, Re0 = ∞, St0 = 0.3. A, E, anguilliform lamprey; B, F, carangiform lamprey; C, G, anguilliform mackerel; and D, H, carangiform mackerel.
