There is a new paper out of press in PNAS Nexus
In this work we helped a team of biologists, physicists and engineers to understand the peculiar effect of energy savings during swimming with varying and multi-modal tailbeat motion. Apparently the additional high-frequency tailbeat motion on top of a low-frequency propulsive motion can help to detach vortices from the tail and save energy or increase power efficiency.
Rea
Tailbeat perturbations improve swimming efficiency by reducing the phase lag between body motion and the resulting fluid response by Chao et al. PNAS Nexus https://doi.org/10.1093/pnasnexus/pgae073