The Shrimp With a Sun Inside Its Claw

This shrimp is far more dangerous than its size would ever suggest. In warm, shallow coastal seas lives a creature scarcely the length of a finger, one oversized claw cocked and held ready like a loaded spring, waiting for its moment.

When the shrimp snaps that claw shut, it happens with such velocity that the strike itself is almost beside the point. The motion creates a bubble in the surrounding water that collapses almost instantly, and for a mere fraction of a second, the interior of that collapsing bubble reaches a temperature approaching that of the sun's own surface. The sound alone exceeds the volume of a gunshot, loud enough on its own to stun or kill small fish nearby.

Nothing about the shrimp itself grows hot in the process. The heat and the sound both originate in the bubble, and both vanish again before either could be felt by anything nearby. Divers working near coral reefs often hear the snap of that claw before they spot a single shrimp among the coral.