How many people can 1 box jellyfish tentacle kill?

Box jellyfish do not have tentacles. They have long appendages called pedalia that are covered in nematocysts. A single box jellyfish can have millions of nematocysts, and each one can deliver a painful sting. The venom of a box jellyfish is extremely potent, and it can cause paralysis and death within minutes.

One small box jellyfish has enough venom to kill dozens of people in under five minutes, making them one of the deadliest animals in the ocean.