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The Cone Snail
The little corn snail produces extremely toxic venom that just one drop of its poison is all it takes to kill 25 adults. The cone snail is famously known as the cigarette snail since it’s sting will give you enough time to smoke one cigarette before dying. Mostly found in tropical seas and oceans, this pretty snail possesses a sting that can penetrate swimsuits and even leather gloves. Their attractive shells make them attractive to most divers, but with no known anti-venom, you’re better off keeping your hands to yourself.