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A duet of divers swim off the southwestern top of England hit the jelly kitty last week after crossing path with a hulkingbarrel jellyfish(Rhizostoma pulmo ) — a seldom seen mintage that can develop about as large as a full - grow human being . Luckily , they filmed the whole thing .
The diver — biologist Lizzie Daly and subaqueous cinematographer Dan Abbott — shared the encounter ina Facebook videoposted Saturday ( July 13 ) as part of the Wild Ocean Week campaign — a serial of telecasting showcasing the oddities of the deep to help elevate money for the United Kingdom’sMarine Conservation Society .

Daly and Abbott were diving off the coast of Cornwall , U.K. , when they find out the giant jelly emerge from the mirky water . Also prognosticate the dustbin - palpebra man-of-war , the species is characterized by eight bouffant arms capped by stinging tentacles and a great , globular top dog that lends the creature its unglamorous nickname . Barrel Portuguese man-of-war sometimes dampen up on the shoring , Daly secern Vice , but it ’s rarefied for a diver to swim cheek - to - faceless - head with one of the massive blobs . [ Marine Marvels : Spectacular Photos of Sea Creatures ]
While the barrel man-of-war is the great species of jelly establish in U.K. waters , it ’s a mere half-pint when compared to thelion ’s mane jellyfish(Cyanea capillata ) , the largest known species in the cosmos . This coldwater jelly is roll in the hay for its galaxy of 1,200 farseeing , trailing tentacles , which can convey an single creature ’s total trunk length to up to 120 feet ( 36.5 meter ) — which is longer than the average blue whale .
This snarl of tentacles is so massive that a undivided lion ’s mane jelly may be capable to prick 50 to 100 multitude in just a few second if currents bear the jelly too nigh to a populated sea-coast — a fun fact that a chemical group of ill-starred New Hampshire beachgoerslearned the gruelling wayin 2010 .

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