A billion green jellyfish washed over the US coast

In recent weeks, about a billion green jellyfish drifted into California, western America, causing a coastline in the shape of a violet blue carpet to fart.

Billions of green jellyfish drifted to the US coast

According to National Geographic, this jellyfish is also called " sailor who follows the wind" or Velella. This species has an average length of about 10 cm, light green, often living on open seas.

Green jellyfish drifted, piling up on the California coast.(Photo: National Geographic)

On it, it has a transparent fin, which acts as a sail, helping them move on the sea surface by the wind and the flow of water. When the wind changed direction, they drifted to the coast, and would certainly die, Kevein Raskoff, marine biologist at Central California's Moterey Peninsula University.

About 4-6 weeks ago, they began to drift up to Oregon and Washington state beaches. After that, they began to appear in California. Raskoff estimates, there are about a billion green jellyfish piled up on California beaches.

These large waves of drift are unusual , Raskoff said. Usually, this phenomenon occurs every 3-6 years . In August 2014, people also saw billions of green jellyfish floating into Oregon and San Diego beaches.

Mr. Raskoff recommends, do not touch the jellyfish. Although their bite does not cause pain, if we rub our hands in the eyes or the sensitive area, we may be allergic.