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robmandu's avatar

Battle of the badass animals.

Asked by robmandu (21331points) February 16th, 2009

In this corner, I have a mantis shrimp.

The “smasher” variant possesses both club- and spear-type appendages which “are employed with blinding quickness, with an acceleration of 10,400 g and speeds of 23 m/s from a standing start, about the acceleration of a .22 caliber bullet. Because they strike so rapidly, they generate cavitation bubbles between the appendage and the striking surface. The collapse of these cavitation bubbles produces measurable forces on their prey in addition to the instantaneous forces of 1,500 N that are caused by the impact of the appendage against the striking surface, which means that the prey is hit twice by a single strike; first by the claw and then by the collapsing cavitation bubbles that immediately follow. Even if the initial strike misses the prey, the resulting shock wave can be enough to kill or stun the prey.”

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