"It's a whopper of an animal but it's not life-threatening, although it does sting," reports AFP.
Not much is known about this type of jellyfish which is related to the lion's mane jellyfish, the largest of its kind.
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A lion's mane jellyfish
A huge increase in the number of jellyfish in the waters around Tasmania has been reported in the last month.
The new find should give scientists what they need to give the creature a name.
Jellyfish
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Two Brown Sea Nettle jellyfish are displayed in a tank of the Melbourne Aqarium, 19 December 2006. (WILLIAM WEST/AFP/Getty Images) (credit:Getty)
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Malaysian jellyfish swim in a tank at the Sunshine Aquarium in Tokyo on August 1, 2011. (YOSHIKAZU TSUNO/AFP/Getty Images) (credit:Getty)
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A Papuan jellyfish swims in a tank at the Sunshine Aquarium in Tokyo on August 1, 2011. (YOSHIKAZU TSUNO/AFP/Getty Images) (credit:Getty)
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A Moon jellyfish swims beneath the waters of Inner Farne on June 26, 2011 at the Farne Islands, England. (Dan Kitwood/Getty Images) (credit:Getty)
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A picture taken on June 17, 2010 shows a jellyfish in a fish tank at the 'Grand Aquarium' (Big Aquarium) of Saint-Malo, western France. (FRED TANNEAU/AFP/Getty Images) (credit:Getty)
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A Lion's Mane jellyfish swims beneath the waters of Inner Farne on June 24, 2011 at the Farne Islands, England. (Photo by Dan Kitwood/Getty Images) (credit:Getty)
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Jelly fishes float in a tank at Osaka Kaiyukan Aquarium on May 7, 2010. (KAZUHIRO NOGI/AFP/Getty Images) (credit:Getty)
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Jelly fish swim on July 01 2008 in one of the biggest marine habitat in the Middle East at Palm Island's Atlantic resort in Dubai. (MARWAN NAAMANI/AFP/Getty Images) (credit:Getty)
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A Pacific sea nettle jellyfish glides in its aquarium at a marine themed park in Hong Kong on October 20, 2010. (ANTONY DICKSON/AFP/Getty Images) (credit:Getty)
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This view taken on July 1st, 2010 shows a jellyfish and green algae on the Ris beach in Douarnenez, Brittan. (FRED TANNEAU/AFP/Getty Images) (credit:Getty)
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Under varied lighting, Jellyfish swim in an aquarium at the Blue Zoo Aquarium in Beijing on August 3, 2010. (FREDERIC J. BROWN/AFP/Getty Images) (credit:Getty)
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A Brown Sea Nettle jellyfish is displayed in a tank at the Melbourne Aqarium, 19 December 2006. (WILLIAM WEST/AFP/Getty Images) (credit:Getty)