Killer Whale
Do you remember Free Willy? That lovable hunk of whale was everyone’s dream pet. But where exactly would you put a killer whale? They are known to be friendly animals, unless threatened, of course. In February 2010, a killer whale named Tilikum, killed its trainer by pulling her into the water by her ponytail and drowning her.
Box Jellyfish
Unlike other deadly animals that have razor-sharp fangs, strong limbs or even beautiful colors to attract prey, the box jellyfish is as much an obvious threat as a cube of jello is. What many people don’t know, is that aside from the venomous tentacles it swims with, it can kill a human in a matter of minutes. Some effects of its sting, even after being treated, could be permanent seizures and other nervous system complications.