Fig. 4. In-focus, numerically reconstructed, dorsal (A) and lateral (B) views of the same swimming copepod, from the hologram of Fig. 3. s, setae on antennule; f, feeding appendages; p, tracer particle (there are many). Inserts show the feeding appendages in up-stroke (top) and down-stroke (bottom) positions. Scale bar, 1 mm.