A swarm of jellyfish caused the nuclear power plant to stop operating. According to foreign media such as the Daily Mail, the Gravlin nuclear power plant in northern France has been temporarily shut down due to the sudden appearance of a large swarm of jellyfish.

Four reactors at France’s Gravelines nuclear power plant were shut down late Sunday due to a swarm of jellyfish in the cooling systems, operator EDF said on Monday, likely due to rising water temperatures because of global warming.

A French nuclear plant temporarily shut down on Monday due to a "massive and unpredictable presence of jellyfish" in its filters, its operator said. The swarm clogged up the cooling system and caused four units at the Gravelines nuclear power plant to automatically switch off, energy group EDF said.