#9 Sicarius Spider
Sicarius spiders are under six-eyed sand spiders and these spiders like to bury themselves in the sand while waiting for prey. They’re common in South America and Southern Africa and are theorized to have the most dangerous venom in the world.
This shy spider rarely bites humans but when it does, it hasn’t been nice. Two alleged bite cases showed massive necrosis and hemorrhaging, with similar effects to rattlesnake venom.
This, together with toxicology reports, help showcase that their venom is most likely fatal.