Box Jellyfish Found primarily in the waters around Australia and Southeast Asia, the box jellyfish's tentacles contain venom that can cause heart failure, paralysis, and death.
Inland Taipan (Fierce Snake) Native to Australia, the inland taipan has the most toxic venom of any snake, capable of killing a human in less than an hour.
Blue-Ringed Octopus Small but deadly, the blue-ringed octopus, found in the Pacific and Indian Oceans, carries enough venom to kill multiple humans, with no known antidote.
Stonefish The stonefish, found in coastal waters of the Indo-Pacific, is the most venomous fish in the world, with venom that can cause excruciating pain, tissue damage, and death.
Cone Snail Cone snails, found in warm seas worldwide, have a harpoon-like tooth capable of delivering a venomous sting that can paralyze and kill.
Brazilian Wandering Spider This highly venomous spider, native to South America, can cause severe pain, systemic effects, and sometimes fatal outcomes in humans.
King Cobra The king cobra, found in forests from India to Southeast Asia, delivers venom that affects the nervous system and can cause death within minutes if untreated.