Alexander RM (1977) Swimming. In: Alexander RM, Goldspink G (eds) Mechanics and energetics of animal locomotion. Chapman and Hall, London, pp 222–248 Google Scholar Arata GF (1954) A note on the flying behavior of the certain squids. Nautilus 68:1–3 Google Scholar Au D, Weihs D (1980) At high speeds dolphins save energy by leaping. Nature 284:548–550. doi:10.1038/284548a0 Article Google Scholar Az