Venom is a complex substance created by some animals to protect themselves and to help them hunt their prey. There are hundreds of venomous animals found around the world, and many of these stinging hunters are found in the depths of the ocean. Animals like the blue-ringed octopus use their strong venom to paralyze their prey, but their venom can hurt people too! Discover the ocean's most venomous animals and how their dangerous stings are used to their advantage.