It's been less than a month since sightings of deadly Portuguese Man O'War jellyfish closed three Benidorm beaches and sent Marbella holidaymakers into a frenzy.
And it would seem the Spanish coast isn't the only place vulnerable to jellyfish invasions this summer as a second mammoth jellyfish has just been caught on camera in British waters.
Incredible pictures of a huge barrel jellyfish went viral earlier this week when diver Dan Abbot encountered one he described "as big as him" while filming marine life around the coast with biologist Lizzie Daly, host of BBC Earth.
The pair were on their last leg of their tour of the British Isles when they decided to go for a dip off the coast of Falmouth, Cornwall, and spotted the massive jellyfish that was "about a metre and a half long, probably half a metre in width."
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Now we don't know about you, but at this point we'd be hotfooting it in the opposite direction as quickly as our little flippers could carry us. But not Dan - Dan stuck around to catch the whole thing on camera.
"It's the biggest jellyfish I've ever seen, in some ways I was shocked but not in a negative way, more awestruck," added the 32-year-old.
"It was an incredible animal, we both came out the water completely mind blown from that experience."
While we get that one sighting might not necessarily be "negative" to a marine enthusiast, a second video has now emerged off another suitably-huge jellyfish and people are understandably freaking out that we might have an invasion on our hands.
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Estimated to be 8ft long, the second even bigger monster from the deep was discovered in St Austell Bay, Cornwall, and was captured on video by Will Hancock, owner of the Fowey Shellfish Company.
"I get in the water sometimes to look at our site and out the corner of my eye I saw something that was bigger than me," he said of the sighting. "It was at least 8ft long and probably 4ft wide. It was the biggest one I've ever seen."
While experts say that the warmer weather may be bringing their prey into British waters and an invasion could be imminent (eek), Will believes their huge size could be down to diet.
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"It's probably because of what they feed on, that's why they're getting so big," he explained. "They've got so much to feed on that they're growing quite large."
Marine ecologist Dr Victoria Hobson, who has ten years' experience studying barrel jellyfish, added: "There's lots out there, there's not just one of two of them...
"They do have a sting but it's quite mild like a nettle sting - I would highly recommend you don't go hugging them though."
Well at least that's something.
Featured Image Credit: SWNS