A numerical simulation is performed to simulate a fish doing a C-start to escape a predator. The movie visualizes the outcome of the simulation as seen through the vorticity field. The scientific article is here http://dx.doi.org/10.1017/jfm.2011.558.
Partial credit: Mattia Gazzola and Petros Koumoutsakos. Visualized tool developed by Diego Rossinelli.