A warning has been issued by the Royal National Lifeboat Institution after another 'deadly' sea "alien" was found on a Wirral beach.
More Portuguese Man O'Wars, also know as the blue bottle jellyfish (although it is not a jellyfish), have been washing up on the Merseyside coastline.
West Kirby RNLI tweeted: "This was found today on Caldy Beach. It is a Portuguese Man O'War. If you see one, DO NOT TOUCH, They give a nasty sting, even when dead."
READ MORE: Woman's warning after taking dog out for morning beach run
It comes after another was spotted by a couple on Ainsdale beach in Southport over the weekend.
Karl Lee, 47, was walking with his wife yesterday (Sunday, November 7) when they spotted a "strange" looking sea animal.
Karl said: "[It was] very strange at first I thought it was a balloon until I had a closer look and identified it using an app and realised what it was and how dangerous they are and looked up that they have been washing up along the coast from Cornwall to Cumbria."
The Portuguese Man o'War is a deadly jellyfish-like animal that can have tentacles to as long as 100ft.
Highly venomous, it could kill a human in some cases, although this is very rare. It is a carnivorous sea monster that stings and paralyses its prey before devouring them.
Karl took to Facebook to warn those who may be walking their dogs on the beach.
In the post, he said: "Watch out on Ainsdale beach with your dogs found a Portuguese Man of war."
Commenting on our previous story, one said: "It looks alien."
Many suggested that it was not uncommon to see these types of creatures washed up on UK coastlines, but it is quite rare for this far north.
It is possible the recent high tides and strong winds could have led to the sightings on the sands of Merseyside.
Georgia de Jong Cleyndert, a marine conservation officer for the Wildlife Trusts told the ECHO due to climate change we could be seeing more of these creatures on our shores.
She said: "We also received reports of Portuguese Man O’ War washing up near Preesall, Lancashire over the weekend. It seems these open ocean drifters are slowly being blown up the Irish Sea.
"These jellyfish-like animals normally live in the open seas but the strong and persistent winds and autumnal storms that we have been experiencing are causing them to be washed ashore.
"Sightings of Portuguese Man-o-War ( Physalia physalis ) occur every few years in the UK but are rarer this far north in the Irish Sea, although sightings are increasing.
She added: "These beautiful creatures are not ‘true jellyfish’ but very close relatives of jellyfish, corals and anemones. They are siphonophores – a group of highly specialised clones called ‘zooids’ that all work together as one animal. Each of their zooids takes on a different form and function. Some are specialised for feeding, some for catching prey and even one for floating.
"They are held afloat by a bright blue-purple gas filled bladder, which has a crest like structure at the top and acts like a sail.
"They can't swim and are at the mercy of the winds - which is why they often end up washed ashore after big storms.
"They have blue tentacles that hang below the surface, stretching over 10 m in length, which have thousands of stinging cells that deliver venom to paralyse and kill their prey (small fish and crustaceans).
"Though it is rarely fatal for humans, their sting can pack a painful punch. They can still sting even when dead so keep children and dogs away.
"With a changing climate and the prospect of more stormy weather, it is also likely that there will be an increase in the frequency of occurrence of strandings of these beautiful open ocean drifters."
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