The vast pattern appeared in the field last week and experts are claiming it to be the first of its kind in the world.

Karen Alexander, a crop circle expert, said: "We have seen butterfly and bird patterns in the past, but this is the first jellyfish crop circle in the world.

"It is absolutely huge - roughly three times the size of most crop patterns and extremely interesting. People have been aghast at the size of it. It is a complete monster.

"We are looking into the meaning of it, but at present it just seems to have appeared out of nowhere."

Crop circle theorists known as 'croppies' - believe the patterns are created by UFOs during nocturnal visits, or caused by natural phenomena such as unusual forms of lightning striking the earth.

But it has been proven the patterns can be easily created artists.

Last year a crop circle described as the most complex ever to seen in Britain was discovered in a barley field in Wiltshire.

The formation, measuring 150ft in diameter, was a coded image representing the first 10 digits, 3.141592654, of pi.

Michael Reed, an astrophysicist, said: "The tenth digit has even been correctly rounded up. The little dot near the centre is the decimal point.

"The code is based on 10 angular segments with the radial jumps being the indicator of each segment.

"Starting at the centre and counting the number of one-tenth segments in each section contained by the change in radius clearly shows the values of the first 10 digits in the value of pi."

Phantoms and Monsters