A nuclear power plant in northern France hit by a jellyfish invasion was getting back online on Wednesday, operator EDF said, with service restored at the first of four closed reactors.

The circumstances highlight a greater issue. Swarm of jellyfish overwhelms nuclear power plant, causes several reactors to shut down — here's what happened first appeared on The Cool Down.

A huge nuclear power station in France has temporarily shut down after a "massive and unpredictable" swarm of jellyfish swam into the cooling system.