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Lucky Scuba Diver Gets To Witness The Beautiful, Synchronized Movement Of 1 Million Fish

May 2, 2015
The ocean is a vast, beautiful place, but this is definitely one of those things you never expected to see. On a dive in Grand Cayman, William Mitchell got a once-in-a-lifetime experience when he swam through a cave teeming with countless Atlantic silverside, a small silver-colored fish that likes to use a "strength in numbers" strategy to defend against predators.

The cave, known as the Devil's Grotto, is a popular dive site familiar to locals and tourists. Silversides tend to gather in huge numbers around Grand Cayman in the late summer/early fall. The schools are so large that they are popularly referred to as a "silver rush" by divers. The fish are marked by their ability to navigate and move together as a tight unit, and scientists are still trying to understand how they can achieve this kind of perfect synchronization with such large numbers.
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