Mallorca beach is covered in slimy blue mass after bizarre natural event

A bizarre natural event has caused a beach in Majorca to be covered in a slimy blue mass.

Locals and holidaymakers alike did not wake up this morning to the typical golden sandy beaches which make the Balearic island such a popular tourism hotspot.

Instead, they were confronted with coastlines in Port de Sóller that were blanketed with hundreds, if not thousands, of slimy blue objects. 

A video of the strange sighting shows more and more of the strange masses being dragged onto the shore by the waves before they become stranded on the sand.   

Despite the sighting looking like something from another planet, there is in fact a perfectly earthly explanation for the phenomenon.

The odd looking objects are in fact By-the-wind-sailor jellyfish which are often washed ashore by strong wind.

FaceBook user, Jake Bullit spotted the By-the-wind-sailor jellyfish on the beach and shared his sighting online.

'Poor little Velella (By-the-wind-sailor), hundreds of thousands of them washed up at the west end of the bay with many more still being swept ashore', he wrote.  

Despite barring a striking resemblances to the Portuguese man o' war - which is infamous for its nasty sting - the By-the-wind-sailors are harmless to humans with their sting only causing a mild skin irritation.

However, the issue these beaches in Majorca now face is with disposing of the dead creatures which not removed quickly can start to rot emitting a bad odor while attracting flies. 

The By-the-wind-sailor are popular in warmer waters in the months of spring and winter. 

They get their names due to their odd shape which resembles a ship's sail. 

True to their name the jellyfish travel in colonies across the world using their 'sail' to help them make the crossing.

During their journey, the By-the-wind-sailors use their tentacles and stings to prey on smaller animals and young fish.