The seas off China have been hit by their largest ever growth of algae, ocean officials said, with vast waves of green growth washing onto the shores of the Yellow Sea.
Pictures showed beachgoers swimming and playing in the green tide in the eastern city of Qingdao, while bulldozers shovelled up tonnes of algae from the sand.
The State Oceanic Administration said on its website that the algae, enteromorpha prolifera, started to appear a week ago and had spread across an area of 28,900 square kilometres (7,500 square miles).
The previous largest bloom was in 2008 when it affected around 13,000 square kilometres, it said.
Qingdao officials said they had removed around 7,335 tonnes of algae, the official Xinhua news agency reported.
The algal phenomenon is usually caused by an abundance of nutrients in the water, especially phosphorus, although the triggers for the enormous blooms which began to appear in the Yellow Sea in 2007 remain uncertain.
The China Daily quoted professor Bao Xianwen, of the Qingdao-based Ocean University of China, as saying: “It must have something to do with the change in the environment, but we are not scientifically sure about the reasons.”
The algae are not toxic nor detrimental to water quality, but lead to extreme imbalances in marine ecosystems by consuming large quantities of oxygen and creating hydrogen sulphide.
New 2020 poll shows Trump trailing all Democrats — some by double-digits
President Donald Trump trails all of his Democratic rivals in hypothetical matchups of the 2020 presidential race, according to the result of a new poll released Tuesday.
The survey, conducted by Emerson Polling, found that the president lags behind former vice president Joe Biden and Sen. Bernie Sanders, I-Vt., by 10 points nationally — 45 percent to 55 percent. He also trails Sen. Elizabeth Warren by six points — 47 percent to 53 percent —and Sen. Kamala Harris, D-Calif., and South Bend, Ind. Mayor Pete Buttigieg by four points — 48 percent to 52 percent.
Beto O’Rourke’s ‘war tax’ policy proposal is straight out of ‘Starship Troopers’
Amid an overcrowded Democratic presidential candidate field, it's hard to distinguish yourself from the pack if you don't slot easily into the scale that runs from "pro-corporate centrist" to "left-populist." If you're former Texas congressman Beto O'Rourke — who falls somewhere in the middle, politically, and somewhere towards the top, looks-wise — you pull a militaristic policy proposal out of your hat that recalls some of the most campy pseudo-fascist sci-fi ever written.
Lawrence O’Donnell aired hard-hitting expose on Trump, Jr — and the president tweets ‘presidential harassment’
MSNBC anchor Lawrence O'Donnell on Tuesday broadcast a hard-hitting segment on Donald Trump, Jr. for defending his father against claims of rape -- despite the fact his own mom made similar allegations.
The host attempted to understand why Sen. Lindsey Graham (R-SC) and Trump, Jr. are so obidient to Trump when they both used to despise him.
O'Donnell noted a tweet by Trump, Jr. on the latest allegations against his father.
Moments after the segment ended, the president tweeted.