Scientists have a variety of ways of measuring an animal’s venom. They can measure how strong the venom is, how much venom the animal can inject at one time, or how much damage the venom does. CNET combined these measurements to make a list of the world’s most venomous animals. The list includes some expected animals, such as snakes, scorpions, and spiders. But it also includes the cone snail and the blue-ringed octopus. Topping the list is the box jellyfish, whose venom can kill its victims in just minutes.