Scientists have warned swimmers that Britain's seas could turn into 'jellyfish soup' this summer as big swarms of poisonous jellyfish are marching into coastal waters around the country.

According to the Marine Conservation Society, some stretches of seas around Britain have already been turned into a ‘jellyfish soup,’ and their numbers could increase throughout the summer as increasing sea temperatures offer ideal conditions for the creatures.

Program manager Peter Richardson said pollution, over-fishing and even climate change could be some of the reasons behind the increasing numbers of jellyfish.

Speaking on the topic, Richardson said, “They are increasing around the world and it has been linked to pollution, over-fishing and possibly climate change.”

He added that some areas, such as the Irish Sea, have been found abundant in lion’s mane, moon, blue and compass jellyfish. Only previous month, hundreds of moon jellyfish were washed up on Portobello beach and East Beach in North Berwick.

Earlier this year, UN scientists said that increase in CO2 output was making seas on Earth more acidic and warned that it could lead to a huge increase in jellyfish numbers.