Box jellyfish are often feared as dangerous animals, with some species capable of causing severe or even fatal stings.

Box jellyfish glide through tropical shallows with an almost delicate grace, yet their venom ranks among the most lethal on Earth. A sufficiently heavy sting can shut down a person’s heart in just a ...

Box jellyfish get their name from their cube-shaped bell, with long tentacles trailing from each corner. When alive in the water, those tentacles can stretch several feet. "Unlike most jellyfish, they ...