A massive number of small, nearly transparent jellyfish have stung over 700 people since Sunday across Spain, according to the Associated Press.
Most of the attacks have been on the Costa Blanca, where officials claim warmer waters are to blame. 380 people were stung in one day in the area. Tourism officials told the Associated Press that more jellyfish were ending up on the beaches due to strong currents. Meanwhile, the Associated Press reported, in Spain's north, man-of-wars have plagued the shores of Cantabria and the Basque Region.
This isn't the first time jellyfish have plagued the area this summer. In Denia, on the northern coast, roughly 4,000 people were treated for stings in the first week of August.
Meanwhile, in New Hampshire, a rare Lion's Mane jellyfish stung beachgoers at the end of July.