How This Teeny-Tiny Sea Critter Punches Like Mike Tyson

Using a camera shooting 300,000 frames per second, researchers catch the amphipod snapping its extraordinarily powerful claw.

At less than a quarter-inch long, the amphipod—a crustacean that looks a bit like a shrimp—lives a leisurely life, sifting through algae up and down the East Coast. Well, it’s superficially leisurely, as scientists just discovered. A male amphipod wields a massive claw that can exceed a third of his mass, and when he snaps it in less than a 10,000th of a second, it marshals a supercharged jet of water to make his displeasure known. Thanks to a $150,000 camera that shoots at 300,000 frames per second, researchers have

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