Margen
The mantis shrimp, a crustacean of striking colours, hides one of the most brutal weapons in the animal world: an almost supersonic strike.
Its front appendages fire off at an acceleration comparable to a bullet's, and so fast that they create vapour bubbles in the water, a phenomenon called cavitation. When they burst, those bubbles release a flash of light and a shock wave, so the prey actually takes two blows: one from the appendage itself and one from the bubble. The force is such that these animals have been known to break aquarium glass.
As if that were not enough, they have some of the most complex eyes we know of, able to perceive kinds of light we cannot even imagine.
Source: Natural History Museum (London)