These 16 Animals Are The Meanest On The Planet

10. Box Jellyfish

box-jellyfish

In the ocean, there lies a meanie called the box jellyfish. The box jellyfish, also known as the sea wasp, is also the most venomous sea creature, with the venom from a single box jellyfish being enough to kill about 60 adult humans. Oh, and they are quite the active hunters too, so it is best to steer clear of these jellies.

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