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Scientists at the Schmidt Ocean Institute recently captured footage of this elusive giant of the deep.
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A spokesperson for the Department of Defense has issued a statement regarding the footage that emerged earlier this month.
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The object, which was only visible using thermal imaging cameras, seemed to have appendages dangling from its underside.
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A rare and fascinating species of jellyfish has been spotted during recent efforts to explore the seas of the Antarctic Peninsula.
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Scientists have revealed the discovery of the world's largest known crown jellyfish and it looks decidedly alien.
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Video footage has emerged showing vast numbers of giant pink jellyfish crammed together in the water.
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A video uploaded earlier this week shows an anomalous object flying high over Brazil's most populous city.
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Two divers exploring the waters off the coast of Cornwall, England came across something rather spectacular.
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Researchers have captured footage of a remarkable, previously unseen type of jellyfish deep beneath the sea.
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Scientists have captured footage of arctic jellyfish slithering along the bottom of the Chukchi Sea.
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Hundreds of large barrel jellyfish have been washing up on beaches along the British coastline this week.
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Marine biologists have recorded footage of a remarkable jellyfish in the depths of the South Pacific.
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Visitors to the Australian east coast at the weekend were greeted by a thick blanket of blue jellyfish.
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Scientists exploring the depths of the Mariana Trench have come across an otherworldly looking creature.
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Marine biologists have been struggling to identify a 4ft jellyfish that washed up on a Tasmania beach.
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A science team in South China achieved the feat by injecting the animals with the DNA of a jellyfish.
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A swarm of jellyfish managed to shut down one of the world's largest nuclear reactors this week.