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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 .

Frame taken from the video captured of the baby Colossal squid swimming.

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 .

A large deep sea spider crawls across the ocean floor

in the beginning publish onLive Science .

blue blob-shaped dead creatures on a sandy beach

Jellyfish Lake seen from the viewpoint of a camera that is half in the water and half outside. We see dozens of yellow jellyfish in the water.

The oddity of an octopus riding a shark.

An orange sea pig in gloved hands.

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Mastigias jellyfish

Jellyfish swarms

<em>Cassiopea</em> jellyfish, known as upside-down jellyfish for their preferred position, appear to sleep at night.

Scientists spotted this huge jellyfish (<em>Chrysaora melanaster</em>) dragging a crustacean with one of its tentacles under the sea ice covering the Chukchi Sea off the north coast of Alaska.

These images show Pseudooides, a fossil embryo smaller than a grain of sand. Long thought to represent the embryonic stage of an arthropod, this fossil is now revealed to be the first stage of development of an ancestor of today�s jellyfish.

An image comparing the relative sizes of our solar system�s known dwarf planets, including the newly discovered 2017 OF201

a view of a tomb with scaffolding on it

an illustration showing a large disk of material around a star

A small phallic stalagmite is encircled by a 500-year-old bracelet carved from shell with Maya-like imagery

a person holds a GLP-1 injector

A man with light skin and dark hair and beard leans back in a wooden boat, rowing with oars into the sea

A photo of Donald Trump in front of a poster for his Golden Dome plan