The 1.5-metre creature (4ft 11in) was discovered by a family last month as they collected shells on a beach near Hobart, Tasmania.
The Lims were so stunned by the gigantic jellyfish they took a photograph and sent it to the Commonwealth Scientific and Industrial Research Organisation (CSIRO).
Scientists say the sticky blob could be a type of lion’s mane – or ‘snot’ – jellyfish, but they have never seen one so big before. Researchers believe this previously unidentified giant jellyfish could be a new type.
CSIRO scientist Lisa-Ann Gershwin, who has been studying jellyfish for 20 years, said she had heard stories of a big white-ish creature with a distinctive pink tinge in the middle.
She said rumours of its existence in Tasmanian waters had been circulating for more than a decade.
She told the Sydney Morning Herald: ’I’m just rapt by it, honestly. It’s such an amazing find.’
Dr Gershwin said reports of these jellyfish sightings intensified over the summer. She added: ’It boggles the mind. I mean, it’s so big. I knew that the species gets fairly large, but I didn’t know that it gets that large.
‘We don’t actually know what’s going on that’s led, not only to this species, but many, many types of jellyfish blooming in massive numbers. Jellyfish do bloom as a normal part of their life cycle, but not usually this many.
‘There’s something going on and we don’t know what it is.’