Tourists were left 'shaking' with fear after a great white shark came thrashing out of the water and took down its prey.
The stunned onlookers were just a few metres from the powerful killer when the attack happened, off the Head of the Meadow Beach in Cape Cod, Massachusetts, United States, yesterday.
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In a clip shared on the Atlantic White Shark Conservancy Facebook group, the huge shark can be seen making its way through the water.
Just a few seconds later, things take a more sinister turn as the great white attacks a seal, before the water turns a dark shade of red.
A voice from behind the camera can then be heard saying: "I'm shaking."
Commenting on the video, one person who seems to have witnessed the sighting, explained what happened.
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They wrote: "This was in about five feet of water at high tide. There were three swimmers within 15-20 of the seal when it got hit. I think there were two sharks but only one came up out of the water enough to see his face. This was only 3-4 yards off shore. Right place at the right time."
Another video of the same attack was also shared. The second clip - taken by a man called James - shows the shark writhing in the water as it takes down the other animal.
Since the original clip was shared in the group, it has been viewed more than 25,000 times, with people divided on whether it's incredible or terrifying.
One person wrote: "Thanks for the footage - I was there and saw it live. Was crazy how close to shore it was...."
A second said: "You couldn't pay me to stick a foot in that water..."
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"That sounds really close to shore!! Would love to see one but I would never go in that water!!!" commented a third.
While another warned: "Shouldn't go more than ankle deep; esp Head of Meadow and Longnook."
A couple of people even wondered whether there was more than one shark roaming about in the water.
They asked: "Am I seeing a larger white shark make a meal of a smaller shark? Looked like big dorsal fin going after little." But these fears were put to bed by another user, who said: "No dorsal fin and tail fin!!!!"
Featured Image Credit: PATopics: Interesting, US News, Animals