It looks like something from a terrifying horror movie, but this is the mystery sea creature that’s baffled experts after washing up on a tourist beach in Mexico.

The monstrous 4-metre (13-foot-long) beast was discovered on Bonfil Beach, in the city of Acapulco, in the south-west Mexican state of Guerrero.

Stunned beach-goers stood around the beast and began taking photos - while also speculating on the possible species of the creature.

The creature’s body was washed on the shore by strong currents that have been affecting parts of the Mexican coast.

Rosa Comacho, the coordinator of the Civil Guard and Fire Brigade believes the animal had not been dead for a long time - but it has started to rapidly decay.

She said: ‘We have no idea what type of animal this is, but I do know that it does not smell bad or have a fetid aroma.

‘It is four metres long and was found on Bonfil Beach.’

The photos of the mysterious creature have since provoked huge debate online - with some suggesting that it might be a type of giant squid, while others have suggested that it is a whale.