Deadliest Creatures You Won't Believe Actually Exist

This sick creature lives in the fish mouth without being noticed

Creepy parasites are found all over the animal world if you go throughout history. They infect humans with deadly illnesses through bites or simply by being around open wounds or mucous membranes, much like the flesh-eating fungi! However, that's nothing compared to the cookie-cutter shark, which, yes, does almost exactly what it sounds like. Except that they cut dolphins, not cookies. Then there’s the assassin bug, which, well, also does exactly what it sounds like. They’ll mercilessly kill humans, their own kind, and even their own family. But to get to the creepiest tongue parasite that lives inside fish mouths, you'll have to watch till the end!

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