Fish create massive ball in water by Aaron Bull (8 images)

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Hundreds of thousands of fish swim together in huge balls up to 100ft-wide and create a vortex as divers swim towards them.

The massive group of baitfish packed tightly together and swam around in synchronisation with each other, creating a compact ball-shape as they did.

As the snorkelers swam towards the ball, the fish quickly move and form a vacuum of space.

This is because the baitfish, often hunted by larger hunters, deployed a defensive mechanism...
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