Dad, Rakesh, said the family had been watching a feature on the jelly on BBC news at the weekend and had then accidentally stumbled across some on a walk at Marsden Moor.

Rakesh, who runs the Northgate paper shop at Almondbury, said: “We were walking up towards Buckstones and my son came across some just off the footpath.

“It’s just bizarre how we watched about it on TV and then spotted it.

“There are a lot of theories about where it’s come from but I told him not to touch it because we don’t know what it is.

“I don’t know what it is but it seems to be in areas where it’s damp.

“Ketan of course thinks it’s come from another planet.”

A spokesman for Marsden Moor National Park said they had not had any other reports of mystery jelly finds but would look into the matter.

A study by BBC Scotland Outdoors failed to establish what the substance was.

The broadcaster asked algae and fungi experts to analyse the jelly but despite using DNA testing they were unable to determine what it was.

Another common theory is the gloop could be the regurgitations of frogs or toads that have been eaten by birds or other predators.

It is thought an incident in Philadelphia, USA, in the 1950s, when four cops found a 6ft wide disk of quivering jelly, inspired the horror film The Blob.

Have you spotted any strange jelly in the countryside? Contact the Examiner Newsdesk on 01484 437714 or editorial@examiner.co.uk