also: でんきくらげ
noun
Portuguese man-of-war
Colloquial name for the Portuguese man-of-war, a marine hydrozoan known for its painful sting. The literal meaning is 'electric jellyfish'.
See also: 鰹の烏帽子
海岸に電気クラゲが打ち上げられていた。
A Portuguese man-of-war had washed up on the beach.
電気クラゲに刺されるととても痛いらしい。
I hear it's very painful if you get stung by a Portuguese man-of-war.