[["Each tentacle of a box jellyfish has about 500,000 stinging cells containing nematocysts, a harpoon-shaped microscopic mechanism that injects lethal venom into the victim, resulting in cardiac arrest within a few minutes of being stung.", 138.0], ["Box jellyfish, have tentacles covered in biological booby traps known as nematocysts - tiny darts loaded with poison. People and animals unfortunate enough to be injected with this poison may experience paralysis, cardiac arrest, and even death, all within a few minutes of being stung.", 18.0]]
how does a box jellyfish kill you
animals,octopus,jellyfish