These brightly colored frogs secrete toxins through their skin that can be fatal to predators and humans alike.
This adorable primate has a toxic bite, capable of causing severe allergic reactions and even death.
Despite its small size and vibrant appearance, this octopus delivers venom that can paralyze and kill a human in minutes.
Known for its cute, inflated look, the pufferfish contains tetrodotoxin, a poison 1,200 times more lethal than cyanide.
Male platypuses have venomous spurs on their hind legs, causing excruciating pain and swelling.
These spiny mammals carry a mild toxin in their saliva, which they use to coat their spines as a defense mechanism.
With its sleek, playful appearance, the leopard seal is a formidable predator with a powerful bite.
This transparent and delicate-looking jellyfish delivers venom that can cause heart failure and death in minutes.