By opening their jaws in mere microseconds, Chinese giant salamanders create powerful water suction that pulls prey into their mouth.
The wide, broad head and skin of the lower jaw create this powerful water flow.
Image source: Heiss E, Natchev N, Gumpenberge, Weissenbacher A, van Wassenbergh S. 2013. Biomechanics and hydrodynamics of prey capture in the Chinese giant salamander reveal a high-performance jaw-powered suction feeding mechanism. J. R. Soc. Interface 10: 20121028. Figure 6a,e. Note: This is a cropped image.
Image credit: © The authors. Published by the Royal Society under the terms of the Creative Commons Attribution License (CC by 3.0).