海洋專家Georgia de Jong Cleyndert說，在這裡看到這種大小的無脊椎動物是 "不尋常的"。
西北野生動物信託基金的de Jong Cleyndert女士說，她上周在坎布里亞的Sandscale收到一份類似大小的獅鬃的報告。
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A dog walker was stunned to stumble over one of the world's largest jellyfish on a beach.
Andy Donoghue said he "couldn't believe his eyes" when he saw the metre-wide creature, which had washed up on Seacombe beach in Wallasey, Wirral.
The lion's mane jellyfish is widespread across Europe but usually only grows to about 50cm (19ins) in UK waters,
Marine expert Georgia de Jong Cleyndert said it was "unusual" to see an invertebrate of this size here.
He said he was walking along when the pet raced ahead before curiously stopping and "taking a big sniff".
Ms de Jong Cleyndert, of the North West Wildlife Trust, said she had received a report of a similarly-sized lion's mane at Sandscale in Cumbria last week.
She said the species had a "nasty sting" and was most commonly spotted between June and September.
"The largest ever recorded was found off the coast of Massachusetts in 1865 and had a diameter of 2.1m (82 inches) and tentacles around 36m," she added.
Elsewhere, unusually high numbers of octopus have been seen along the Cornish coast this month.
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