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.

Four of the plant’s reactors shut down after swarms of jellyfish clogged its pumping stations. It isn’t the first time the creatures have thwarted nuclear plants.

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.