Talk about adding insult to injury: common thresher sharks (Alopia vulpinus) use their caudal (tail) fin to stun and immobilize small schooling fishes with a lateral strike before predation events.
Sketch and fact contributed by Alex McInturf
[Edited by Adrian Perez]
Source: Aalbers, S. A., Bernal, D., & Sepulveda, C. A. (2010). The functional role of the caudal fin in the feeding ecology of the common thresher shark Alopias vulpinus. Journal of Fish Biology, 76(7), 1863-1868.